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ĐỀ THI CUỐI KỲ I MẠNG MÁY TÍNH

Total questions: 256

Worksheet time: 2hrs 8mins

Name
Class
Date
1.

A computer network operating spanning states, countries, or the whole world is ____________________.

a)

PAN

b)

LAN

c)

MAN

d)

WAN

2.

Computer network is ___________________.

a)

Collection of hardware components and computers.

b)

Interconnected by communication channels.

c)

Sharing of resources and information.

d)

All of the mentioned answers.

3.

A computer network operating within a building or campus is _________.

a)

PAN.

b)

LAN.

c)

MAN.

d)

WAN.

4.

A _________________ is a set of established rules that dictates how to format, transmit and receive data.

a)

Host.

b)

Protocol.

c)

Application.

d)

Server.

5.

What is the use of Ping command?

a)

To test a bug in an application.

b)

To test a hard disk fault.

c)

To test a device on the network is reachable.

d)

To test a printer quality.

6.

How to classify twisted pair UTP cables?

a)

Length of cable.

b)

Material.

c)

Length of twist.

d)

All of the mentioned answers.

7.

Category 5e UTP cable is most often used in ______________ network.

a)
Ethernet
b)

Telephone

c)

Wireless

d)

None of the mentioned

8.

The maximum end-to-end cable length of a single UTP cable that is sufficient for data communication over a computer network is _____________.

a)

120m

b)

100m

c)

150m

d)

90m

9.

The maximum end-to-end cable length of a single coaxial cable that is sufficient for data communication over a computer network is _____________.

a)

200m

b)

300m

c)

400m

d)

500m

10.

What is the difference between wiring codes T568A and T568B?

a)

Difference in color codes wires.

b)

Difference in number of wires

c)

Difference in length of wires

d)

Difference in manufactures standards

11.

________________ is flexible as each packet may travel through a different route to reach its destination.

a)

Circuit Switching.

b)

Packet Switching.

c)

Peer-to-peer.

d)

None of the mentioned.

12.

Which layer of the OSI model does a Hub work in?

a)

Physical layer.

b)

Data link layer.

c)

Network layer.

d)

Transport layer.

13.

Which layer of the OSI model does a Switch work in?

a)

Physical layer

b)

Data link layer

c)

Network layer

d)

Transport layer

14.

Which of the following networks is considered as the first computer network?

a)

ARPANET.

b)

CNNET.

c)

NSFNET.

d)

ASAPNET.

15.

________________ is flexible as each packet may travel through a different route to reach its destination.

a)

Circuit Switching

b)

Packet Switching

c)

Peer-to-peer

d)

None of the mentioned

16.

Which layer of OSI model provides inter network connectivity?

a)

Physical.

b)

Data Link.

c)

Network.

d)

Transport.

17.

Which of the following technique is used for combining multiple signals into one signal over a shared medium?

a)

Digital modulation

b)

Multiplexing

c)

De-multiplexing

d)

None of mentioned answers

18.

A ________________ communication network takes messages from a single sender and transmits to all endpoints on the network.

a)

Point – to – Point

b)

Broadcast

c)

Multicast

d)

None of the mentioned

19.

How many layers does OSI Model have?

a)

4.

b)

5.

c)

6.

d)

7.

20.

A data unit on physical layer is known as ______________.

a)

Bit

b)

Frame

c)

Packet

d)

Segment

21.

How many layers are in the TCP/IP model?

a)

4 layers.

b)

5 layers.

c)

6 layers.

d)

7 layers.

22.

What is the purpose of twisting of the wires for twisted pair cable?

a)

Increase electric interference

b)

Reduce cross-talk interference

c)

Distinguish cable pairs

d)

Protect cable pairs

23.

Which layers of the OSI model are host-to-host layers?

a)

Transport, Session, Presentation, Application.

b)

Network, Transport, Session, Presentation.

c)

Datalink, Network, Transport, Session.

d)

Physical, Datalink, Network, Transport.

24.

Which applications/services are radio waves used?

a)

Radar, radio and TV communication

b)

Microwave ovens

c)

Sterilizing purpose

d)

All of the mentioned answers

25.

Which of the following radiations can be used for communication?

a)

Radio wave, microwave, infrared radiation

b)

Visible light, ultraviolet radiation

c)

X-rays, Gamma rays

d)

All of the mentioned answers

26.

Which layer in the OSI model determines how packets are routed from source to destination?

a)

Application.

b)

Presentation.

c)

Transport.

d)

Network.

27.

Which of the following cables is usually used for cable television?

a)

Fiber optic cable

b)

Coaxial cable

c)

UTP

d)

STP

28.

Which of the following types of networks are classified by function?

a)

Peer – to – Peer, Client – Server

b)

Packet Switching

c)

PAN, LAN, MAN, WAN

d)

Wired, Wireless

29.

Given the following types of waves: (1) Radio waves; (2) Microwaves; (3) Infrared waves, which one is directional?

a)

(1), (2)

b)

(2), (3)

c)

(1), (3)

d)

(1), (2), (3)

30.

What is the commonly used unit for measuring the speed of data transmission?

a)

Byte

b)

Bit per second

c)

Nano second

d)

Mega Hertz

31.

Which layer of the OSI model are operating as same function as the Internet layer of the TCP/IP model?

a)

Transport

b)

Presentation

c)

Session

d)

Network

32.

Which of the following cables is not affected by electromagnetic interference?

a)

Fiber optic cable

b)

Coaxial cable

c)

UTP

d)

STP

33.

Which layer of the OSI model does a Hub work in?

a)

Physical layer

b)

Data link layer

c)

Network layer

d)

Transport layer

34.

How many bits are there in the MAC address?

a)

64 bits.

b)

48 bits.

c)

32 bits.

d)

16 bits.

35.

Which layer of the OSI model does a Router work in?

a)

Physical layer

b)

Data link layer

c)

Network layer

d)

Transport layer

36.

What is the difference between wired network and wireless network?

a)

Mobility

b)

Security

c)

Speed

d)

All of the mentioned answers

37.

Which of the following types of waves are commonly used in remote control devices?

a)

Radio waves

b)

Microwaves

c)

Infrared waves

d)

Gamma rays

38.

_________________ is inflexible once a path is established for transmission, it doesn’t change during the duration of a session.

a)

Circuit Switching

b)

Packet Switching

c)

Broadcast

d)

None of the mentioned

39.

Given the following types of waves: (1) Radio waves; (2) Microwaves; (3) Infrared waves, which one is omnidirectional?

a)

(1)

b)

(2)

c)

(3)

d)

(1), (2), (3)

40.

Which of the following cables is used for connecting computers to switches?

a)

Straight-through cable

b)

Crossover cable

c)

Rollover cable

d)

None of mentioned answers

41.

Which layers of the OSI model are operating as same function as the Application layer of the TCP/IP model?

a)

Transport, Session, Application.

b)

Network, Transport, Presentation.

c)

Network, Transport, Session.

d)

Session, Presentation, Application.

42.

Which of the following commands is used to manage the IP address assigned to the machine that it is running in?

a)

Ping

b)

Route

c)

Nslookup

d)

Ipconfig

43.

Which layer in the OSI model is concerned with the syntax and semantics of the information transmitted?

a)

Application.

b)

Presentation.

c)

Session.

d)

Transport.

44.

The process of encoding bits into their corresponding signals is called ___________________.

a)

Digital line coding

b)

Multiplexing

c)

De-multiplexing

d)

None of mentioned answers

45.

Which of the followings is the correct arrangement of data units of the OSI model based on top-down approach?

a)

Data, Frame, Packet, Segment, Bit.

b)

Data, Packet, Segment, Frame, Bit.

c)

Data, Segment, Packet, Frame, Bit.

d)

Data, Segment, Frame, Packet, Bit.

46.

Which device is used for increasing the power of a signal and retransmitting it?

a)

Hub

b)

Switch

c)

Router

d)

Repeater

47.

Which of the followings is a function of the Data link layer?

a)

Defines the electrical characteristics of signals passed between the computer and communication devices.

b)

Provides error detection and correction.

c)

Select path for transferring data.

d)

None of the mentioned.

48.

Which of the following technique is used for reconverting a signal containing multiple signal streams back into the original separate and unrelated signals?

a)

Digital modulation

b)

Multiplexing

c)

De-multiplexing

d)

None of mentioned answers

49.

Computer network is ___________________.

a)

Collection of hardware components and computers.

b)

Interconnected by communication channels.

c)

Sharing of resources and information.

d)

All of the mentioned answers.

50.

Which of the following physical phenomena is applied in optical fiber transmission?

a)

Scattering phenomenon

b)

Total internal reflection

c)

Dispersion phenomenon

d)

Refraction

51.

A data unit on data link layer is known as ______________.

a)

Bit.

b)

Frame.

c)

Packet.

d)

Segment.

52.

A _______________ is a unique identifier assigned to a network interface controller.

a)

Port address.

b)

MAC address.

c)

IP address.

d)

Port and IP address.

53.

Which of the following types of networks are classified by scale?

a)

Peer – to – Peer, Client – Server.

b)

Circuit Switching.

c)

PAN, LAN, MAN, WAN.

d)

Wired, Wireless.

54.

The maximum end-to-end cable length of a single fiber optic cable that is sufficient for data communication over a computer network is ___________.

a)

1 km.

b)

2 km.

c)

3 km.

d)

4 km.

55.

UTP cable has __________________ cables.

a)

2 pair

b)

3 pair

c)

4 pair

d)

5 pair

56.

Which of the following protocols is responsible for resolving IP address to MAC address?

a)

ARP

b)

HTTP

c)

ICMP

d)

DHCP

57.

Which of the random access protocols does the Ethernet apply?

a)

CSMA/CD

b)

CSMA/CA

c)

ALOHA

d)

Slotted ALOHA

58.

Which of the followings is a characteristic of the Switch?

a)

Plug-and-play

b)

Self-learning

c)

Routing

d)

Plug-and-play and Self-learning

59.

Which of the following statements is true for the Address Resolution Protocol (ARP)?

a)

It is used to resolve IP addresses to domain names.

b)

It is used to translate IP addresses to MAC addresses.

c)

It is used to translate MAC addresses to domain names.

d)

It is used to resolve domain names to IP addresses.

60.

What is the size of the MAC address?

a)

48 bits

b)

16 bits

c)

32 bit

d)

64 bits

61.

Which of the following protocols is the random accessing protocols applying for the MAC layer of a computer network?

a)

TDMA

b)

FDMA

c)

ALOHA

d)

CDMA

62.

Which of the following devices forwarding data based on the destination MAC address?

a)

Hub

b)

Switch

c)

Router

d)

Repeater

63.

Which of the random access protocols does the Wi-Fi apply?

a)

CSMA/CD

b)

CSMA/CA

c)

ALOHA

d)

Slotted ALOHA

64.

Which of the following methods is usually applied for controlling multiple accesses in a computer network?

a)

channel partitioning

b)

random access

c)

token passing

d)

no need an access control method.

65.

In the Slotted ALOHA, collisions could be occurred at

a)

the beginning of the slot

b)

the end of the slot

c)

in the middle of the slot

d)

in any point of the slot

66.

Which of the following statements is true for the Slotted ALOHA protocol?

a)

In the Slotted ALOHA, time is divided into equal size slots and nodes transmit data at the end of each time-slot.

b)

In the Slotted ALOHA, time is divided into equal size slots and nodes transmit data at the start of each time-slot.

c)

In the Slotted ALOHA, time is divided into equal size slots and node transmits data immediately once it has data.

d)

In the Slotted ALOHA, time is divided into variable size slots and node transmits data immediately once it has data.

67.

Which of the following statements is true for the Slotted ALOHA and ALOHA (suppose that the network has N nodes)?

a)

the maximum efficiency of the Slotted ALOHA is equal to that of ALOHA.

b)

the maximum efficiency of the Slotted ALOHA is double to that of ALOHA.

c)

the maximum efficiency of the Slotted ALOHA is smaller than that of ALOHA.

d)

the maximum efficiency of the Slotted ALOHA is 100%.

68.

Assume that the original data is 10100001. Determine the bit sequence to be transmitted by using Cyclic Redundancy Check (CRC) technique with Generator G(x) = x^3 + 1?

a)

10100001 101

b)

10100001 110

c)

10100001 011

d)

10100001 111

69.

Assume that the original data is 10100011. Determine the bit sequence to be transmitted by using Cyclic Redundancy Check (CRC) technique with Generator G(x) = x^3 + 1?

a)

10100011 100

b)

10100011 001

c)

10100011 101

d)

10100011 111

70.

Determine the bit pattern from the international standards generator CRC-CCITT= x^16 + x^12 + x^5 + 1?

a)

10001000000010001

b)

10001000000100010

c)

10001000000100011

d)

10001000000100001

71.

Which of the following statements is true for the ALOHA protocol?

a)

In the ALOHA, time is divided into equal size slots and nodes transmit data at the end of each time-slot.

b)

In the ALOHA, time is divided into equal size slots and nodes transmit data at the start of each time-slot.

c)

In the ALOHA, time is divided into equal size slots and node immediately transmits data once it has.

d)

In the ALOHA, node immediately transmits data once it has.

72.

Determine the bit pattern from the international standards generator CRC-16= x^16 + x^15 + x^2 + 1?

a)

11000000000000101

b)

11000000000000111

c)

11000000000000100

d)

11000000000000011

73.

Which of the following techniques is capable of detecting and correcting single bit error?

a)

Single bit parity scheme

b)

Two-dimensional parity scheme

c)

Cyclic redundancy check

d)

All of the mentioned answers

74.

What does “bps” stand for?

a)

bits per second.

b)

bytes per second.

c)

kilobits per second.

d)

None of mentioned answers.

75.

Which of the following addresses is considered as a MAC address?

a)

192.168.1.1

b)

172.16.10.0/24

c)

FE80::250:56FF:FE87:20FB

d)

60-F6-77-BE-A3-2F

76.

Given the following statement regarding to mechanism for controlling medium access of a computer network: "When the medium is idle for a period of greater than a Distributed InterFrame Space (DIFS), node can transmit data immediately". Which of the following computer networks applies above-mentioned mechanism?

a)

WiMAX

b)

Ethernet

c)

Wi-Fi

d)

Bluetooth

77.

Assume that the original data is 10101 11110 01110. Determine the bit sequence to be transmitted by using two-dimensional parity scheme with even code and matrix (no. of rows N=3, no. of columns M=5)?

a)

101010 111100 011101 001011

b)

101011 111101 011101 001010

c)

101011 111100 011101 001010

d)

101010 111100 011100 001010

78.

What is the difference between wiring codes T568A and T568B?

a)

Difference in color codes wires.

b)

Difference in number of wires.

c)

Difference in length of wires.

d)

Difference in manufactures standards.

79.

Considering transmission efficiency of three protocols: ALOHA, Slotted ALOHA and CSMA protocols. Which of the following answers is true if the transmission efficiency of those protocols is in ascent order?

a)

CSMA – ALOHA – Slotted ALOHA

b)

ALOHA – Slotted ALOHA – CSMA

c)

Slotted ALOHA – ALOHA – CSMA

d)

CSMA – Slotted ALOHA - ALOHA

80.

Determine the bit pattern from the international standards generator CRC-12= x^12 + x^11 + x^3 + x^2 + x + 1?

a)

1110000001111

b)

1100000001110

c)

1100000001111

d)

1100000011111

81.

Which of the following metric is used for measuring of data transferring speed?

a)

b/s.

b)

Mb/s.

c)

Tb/s.

d)

All of the mentioned answers.

82.

Assume that receiver receives a correct data frame containing a bit sequence: 0110001011111. Determine the original data by using single bit parity scheme with even code?

a)

101100010111

b)

010001011111

c)

011000101111

d)

011000101111

83.

Which of the following functions of data link layer helps slow receivers are not swamped by fast senders?

a)

Providing a well-defined service interface to the network layer.

b)

Dealing with transmission errors.

c)

Regulating the flow of data.

d)

None of mentioned answers.

84.

What is the color code for T568A standard?

a)

White/Green, Green, White/Orange, Orange, White/Blue, Blue, White/Brown, Brown

b)

White/Green, Green, White/Orange, Blue, White/Blue, Orange, White/Brown, Brown

c)

White/Green, Green, White/Blue, Blue, White/Orange, Orange, White/Brown, Brown

d)

White/Green, Green, White/Orange, Blue, Orange, White/Blue, White/Brown, Brown

85.

Which of the following addresses is the physical address?

a)

0F-1F-2F-3F.

b)

0F-1F-2F-3F-4F.

c)

0F-1F-2F-3F-4F-5F.

d)

0F-1F-2F-3F-4F-5F-6F.

86.

Which layer in the OSI model controls transmission errors?

a)

Physical.

b)

Data Link.

c)

Network.

d)

Presentation.

87.

Which of the following cables is used for connecting computers together directly?

a)

Straight through cable

b)

Crossover cable

c)

Rollover cable

d)

None of mentioned answers

88.

Which layer in the OSI model is concerned with the syntax and semantics of the information transmitted?

a)

Application

b)

Presentation

c)

Session

d)

Transport

89.

Which layer in the OSI model determines how packets are routed from source to destination?

a)

Application

b)

Presentation

c)

Transport

d)

Network

90.

Which layers of the OSI model are operating as same function as the Application layer of the TCP/IP model?

a)

Transport, Session, Application.

b)

Network, Transport, Presentation.

c)

Network, Transport, Session.

d)

Session, Presentation, Application.

91.

Which of the followings is the correct arrangement of data units of the OSI model based on top-down approach?

a)

Data, Frame, Packet, Segment, Bit.

b)

Data, Packet, Segment, Frame, Bit.

c)

Data, Segment, Packet, Frame, Bit

d)

Data, Segment, Frame, Packet, Bit.

92.

A ________________ communication network takes messages from a single sender and transmits to all endpoints on the network.

a)

Point – to – Point

b)

Broadcast

c)

Multicast

d)

None of the mentioned.

93.

. _________________ is inflexible once a path is established for transmission, it doesn’t change during the duration of a session.

a)

Circuit Switching

b)

Packet Switching.

c)

Broadcast

d)

None of the mentioned.

94.

Which of the following commands is used to manage the IP address assigned to the machine that it is running in?

a)

Ping

b)

Route

c)

Nslookup

d)

Ipconfig

95.

Which layer of the OSI model are operating as same function as the Internet layer of the TCP/IP model

a)

Transport

b)

Presentation

c)

Session

d)

Network

96.

The maximum end-to-end cable length of a single UTP cable that is sufficient for data communication over a computer network is _____________.

a)

120m

b)

100m

c)

150m

d)

90m

97.

The maximum end-to-end cable length of a single coaxial cable that is sufficient for data communication over a computer network is _____________.

a)

200m

b)

300m

c)

400m

d)

500m

98.

The maximum end-to-end cable length of a single fiber optic cable that is sufficient for data communication over a computer network is ___________.

a)

1 km

b)

2 km.

c)

3 km.

d)

4 km.

99.

Which of the following technique is used for combining multiple signals into one signal over a shared medium?

a)

Digital modulation.

b)

Multiplexing

c)

De-multiplexing

d)

None of mentioned answers.

100.

Which of the following technique is used for combining multiple signals into one signal over a shared medium?

a)

Digital modulation

b)

Multiplexing

c)

De-multiplexing.

d)

None of mentioned answers

101.

Which of the following technique is used for reconverting a signal containing multiple signal streams back into the original separate and unrelated signals?

a)

Digital modulation.

b)

Multiplexing.

c)

De-multiplexing

d)

None of mentioned answers.

102.

Which of the following functions of data link layer helps slow receivers are not swamped by fast senders?

a)

Providing a well-defined service interface to the network layer.

b)

Dealing with transmission errors.

c)

Regulating the flow of data.

d)

None of mentioned answers.

103.

Assume that the original data is 10101 11110 01110. Determine the bit sequence to be transmitted by using two-dimensional parity scheme with even code and matrix (no. of rows N=3, no. of columns M=5)?

a)

101010 111100 011101 001011.

b)

101011 111101 011101 001010.

c)

101011 111100 011101 001010.

d)

101010 111100 011100 001010.

104.

Assume that receiver receives a correct data frame containing a bit sequence: 101011 111100 011101 001010. Determine the original data by using two-dimensional parity scheme with even code and matrix (no. of rows N=3, no. of columns M=5)?

a)

10101 11100 01101 01011.

b)

11011 11110 01110 00101.

c)

10101 11110 01110 00101.

d)

11010 11100 01110 00101.

105.

Which of the following methods is usually applied for controlling multiple accesses in a computer netwo

a)

channel partitioning

b)

random access

c)

token passing

d)

token passing

106.

Which of the following protocols is the random accessing protocols applying for the MAC layer of a computer network?

a)

TDMA

b)

FDMA

c)

ALOHA

d)

CDMA

107.

Considering transmission efficiency of three protocols: ALOHA, Slotted ALOHA and CSMA protocols. Which of the following answers is true if the transmission efficiency of those protocols is in ascent order?

a)

CSMA – ALOHA – Slotted ALOHA

b)

ALOHA – Slotted ALOHA – CSMA

c)

Slotted ALOHA – ALOHA – CSMA

d)

CSMA – Slotted ALOHA - ALOHA

108.

Given the following statement regarding to mechanism for controlling medium access of a computer network: “When the medium is idle for a period of greater than a Distributed InterFrame Space (DIFS), node can transmit data immediately”. Which of the following computer networks applies above-mentioned mechanism?

a)

WiMAX

b)

Ethernet

c)

Wi-Fi

d)

Bluetooth

109.

Which of the following algorithms that a network node running CSMA/CA applies for delaying the transmission in order to avoid the collision?

a)

the exponential back-off algorithm

b)

the collision avoidance (CA) algorithm

c)

the carrier sense (CS) algorithm

d)

the multiple access (MA) algorithm

110.

In FDMA, channel spectrum is divided into fixed frequency bands and each station is assigned to one of those frequency bands. How the FDMA deals with an assigned frequency band having no data for transmission?

a)

Remove it

b)

Share it to other stations.

c)

Let it idle

d)

Assign to another station.

111.

In TDMA, channel is divided into fixed length time slots and each station is assigned to one of those time slots. How the TDMA deals with an assigned time slot having no data for transmission?

a)

Remove it

b)

Share it to other stations

c)

Let it idle.

d)

Assign to another station

112.

Which of the following standard is recommended for the Wi-Fi network?

a)

IEEE 802.16

b)

IEEE 802.3

c)

IEEE802.15

d)

IEEE 802.11

113.

Which of the following standard is recommended for the Ethernet network?

a)

IEEE 802.16

b)

IEEE 802.3

c)

IEEE802.15

d)

IEEE 802.11

114.

Which of the following standard is recommended for the WiMAX network?

a)

IEEE 802.16

b)

IEEE 802.3

c)

IEEE802.15

d)

IEEE 802.11

115.

a)

It is used to start the transmission between the sender and the receiver.

b)

It is used to finish the transmission between the sender and the receiver

c)

It is used to inform other stations to avoid a collision.

d)

It is used to “wake up” the receiving adapter and synchronize the receiver’s clock with the sender’s clock

116.

Suppose that the IP address and the Subnet mask of a computer is 172.25.114.250/24. What are its network address and broadcast address?

a)

172.25.114.250 & 172.25.114.0

b)

172.25.114.0 & 172.25.114.255

c)

172.25.114.250 & 255.255.255.0

d)

172.25.114.250 & 172.25.114.255

117.

Suppose that the IP address and the Subnet mask of a computer is 172.25.114.250/16. What are its network address and broadcast address?

a)

172.25.114.250 & 172.25.114.0

b)

172.25.0.0 & 172.25.0.255

c)

172.25.114.250 & 255.255.255.0

d)

172.25.0.0 & 172.25.255.255

118.

Suppose that the IP address of a LAN is 192.168.10.0/24. How many IP addresses are available to be assigned to the hosts (or PCs) of that LAN (including special IP addresses)?

a)

255

b)

256

c)

~24

d)

224

119.

What are following planes organized for to the network layer of the computer network?

a)

Physical plane – Data link plane

b)

MAC plane – Data link plane

c)

Control plane – Data plane

d)

Data link plane – Transport plane

120.

What is the average buffer size B of a router used for routing packets over a link which has the throughput of C = 10 Gbps? Assume the round-trip-time (RTT) of 250 ms.

a)

2.5 Gigabit

b)

2.5 Kilobit

c)

40 Kilobit

d)

40 Gigabit

121.

What is the average buffer size B of a router used for routing 800 flows of data over a link which has the throughput of C = 10 Gbps? Assume that the round-trip-time (RTT) is 250 ms.

a)

3.125 bit

b)

3125 bit

c)

2000 Gigabit

d)

8000 Gigabit

122.

What is the size of an IP v4 address?

a)

32 bit

b)

48 bit

c)

24 bit

d)

8 bit

123.

Which field in the header is applied for determining the priority of an IP v4 packet when forwarding it in a computer network?

a)

Time-to-live (TTL)

b)

Type-of-service (TOS)

c)

Type-of-data (TOD)

124.

What is the size of the checksum field used for checking error of an IP v4 header?32 bit

a)

32 bit

b)

24 bit

c)

16 bit

d)

8 bit

125.

The checksum computation in IP v4 header includes

a)

IP v4 header only

b)

IP v4 data (payload) only

c)

IP v4 header and data

d)

IP header and Pseudo header

126.

Given the IP address of a computer to be: 192.168.1.1. What is its corresponding binary format?

a)

11000000. 10101000. 00000001. 10000000

b)

11000000. 10101000. 00000001. 00000001

c)

10000011. 10100000. 00000001. 00000001

d)

11000000. 10101000. 00000001. 10000001

127.

What are the following parts matched to the format of an IP v4 address?

a)

Domain – Host

b)

Domain – Network – Host

c)

Domain – Network

d)

Network – Host

128.

What are the following IP v4 addresses to be considered as the special addresses?

a)

0.0.0.0

b)

1.1.1.1

129.

Which of the following IP v4 addresses is considered as the loopback address of a computer?

a)

1.1.1.1

b)

127.0.0.1

130.

What is the queuing model applied for packet scheduling inside a router?

a)

First-in-First-out (FIFO)

b)

Last-in-First-out (LIFO)

131.

Suppose that the value recorded in the Time-To-Live (TTL) field of an IP v4 header is 100. What does it mean?

a)

That IP packet has a life-time of 100 seconds

b)

That IP packet could traverse maximum of100 hops

c)

That IP packet has a life-time of 100 hours

d)

That IP packet could traverse maximum of 100 km

132.

What is the size of the IP v4 header?

a)

8 bytes

b)

16 bytes

c)

20 bytes

d)

24 bytes

133.

Suppose that the Maximum Transmission Unit (MTU) of the Data link layer is 1500 bytes, how many segments received by the network layer (from the transport layer) for sending a 4000-byte datagram?

a)

0.375

b)

2.5

c)

3

d)

4

134.

Which of the following Boolean operators that a router applies for determining the network address of a computer from the given IP address and net/subnet mask?

a)

AND

b)

OR

c)

XOR

d)

NOT

135.

Assume that the subnet mask assigned for a computer network working in class C is 255.255.255.192, how many subnets could be organized for that network?

a)

2

b)

3

c)

4

d)

5

136.

Which of the following IP addresses are the private IP addresses?

a)

10.10.10.1; 172.16.0.1; 192.168.1.2

b)

11.11.11.1; 173.16.0.1; 193.168.1.2

c)

12.12.12.1; 174.16.0.1; 194.168.1.2

d)

13.13.13.1; 175.16.0.1; 195.168.1.2

137.

Which the following server is responsible for automatically assigning IP addresses for computers in the network?

a)

DNS

b)

DBMS

c)

DBMS

d)

DBMS

138.

Which of the following function of a router is responsible for translating IP addresses from the local network to the global network (the Internet) and vice versa?

a)

Routing

b)

Forwarding

c)

Forwarding

d)

Forwarding

139.

What is the size of the IP v6 address?

a)

32 bits

b)

64 bits

c)

128 bits

d)

256 bits

140.

Which of the following statement is correct for IP v6 datagram format

a)

The IP v6 datagram format has a 20-byte header.

b)

The IP v6 datagram format has a 32-byte header

c)

The IP v6 datagram format has a 40-byte with optional header.

d)

The IP v6 datagram format has a 40-byte fixed-length header.

141.

Which of the following statement is correct?

a)

Fragmentation is not allowed for IP v6

b)

Fragmentation is allowed for IP v6.

c)

Fragmentation is optional for IP v6.

d)

Fragmentation is fixed for IP v6.

142.

How many 8-bit octets for an IP v6 address?

a)

4

b)

8

c)

12

d)

16

143.

Which of the following statement is true for a routing algorithm?

a)

A routing algorithm is to find the highest-cost path between the source and the destination for forwarding the data

b)

A routing algorithm is to find the longest-cost path between the source and the destination for forwarding the data

c)

A routing algorithm is to find the least-cost path between the source and the destination for forwarding the data

d)

A routing algorithm is to find the average-cost path between the source and the destination for forwarding the data

144.

The Dijkstra routing algorithm is categorized as

a)

A link-state routing algorithm

b)

A distance vector routing protocol

c)

A hierarchical routing protocol

d)

An inter-AS routing protocol

145.

The Bellman-Ford routing algorithm is categorized as

a)

A link-state routing algorithm

b)

A distance vector routing protocol

c)

A hierarchical routing protocol

d)

An inter-AS routing protocol

146.
a)

u,x

b)

u,v

c)

u,w

d)

u,z

147.

Which problem does the Dijkstra routing algorithm possibly face?

a)

Routing oscillation

b)

Route congestion

c)

Route break

d)

Route restart

148.

In Bellman-Ford routing, which of following statement is appropriate?

a)

Each network node constructs its distance vector based on routing information shared among neighbor nodes.

b)

Each network node constructs its distance vector based on its local routing information.

c)

Each network node constructs its distance vector based on its link state information.

d)

Each network node constructs its distance vector based on measuring the distance to neighbor nodes.

149.

Which problem does the Bellman-Ford routing algorithm possibly face?

a)

Route Congestion

b)

Route break

c)

Route restart

d)

Count to infinitive

150.
a)

4

b)

44

c)

56

d)

60

151.

Which of the following routing protocols are suitable for intra-AS routing?

a)

SNMP/TCP/UDP

b)

FTP/HTTP/HTTPS

c)

RIP/OSPF/IGRP

d)

TCP/UDP/ICMP

152.

Which of the following routing protocols is suitable for inter-AS routing?

a)

RIP

b)

OSPF

c)

BGP

d)

UDP

153.

Which of the following protocol is used for error reporting in a computer network?

a)

DHCP

b)

DNS

c)

ICMP

d)

SNMP

154.

Which of the following statements is true for the network management framework?

a)

A managed device contains only one managed object

b)

A managed device does not have a database for management purpose.

c)

A network device cannot be managed.

d)

A managed device can contain many managed objects whose data is stored in the Management Information Base (MIB)

155.

Which of following modes are used by the Simple Network Management Protocol (SNMP) to convey information to/from Management Information Base (MIB)?

a)

request-response mode and trap mode

b)

request mode only

c)

response mode only

d)

trap mode only

156.

Which layer should receive the data after the Transport layer aggregates data from different applications into a single stream before passing it ?

a)

Network layer

b)

Data link layer

c)

Application layer

d)

Physical layer

157.

Which layer should receive the data after the Transport layer aggregates data from different applications into a single stream before passing it ?

a)

Network layer

b)

Data link layer

c)

Application layer

d)

Physical layer

158.

Which of the following protocols are used in transport layer?

a)

TCP and FTP

b)

UDP and HTTP

c)

TCP and UDP

d)

HTTP and FTP

159.

Which is the correct statement for the transmission control protocol?

a)

Is a connection-oriented protocol

b)

Uses a three way handshake to establish a connection

c)

Receives data from application as a single stream

d)

All of the mentioned

160.

One endpoint of a two-way communication link between two programs running on the network is called?

a)

socket

b)

pipe

c)

port

d)

machine

161.

Which one of the followings is a version of UDP with congestion control?

a)

Datagram congestion control protocol

b)

Stream control transmission protocol

c)

Structured stream transport

d)

User congestion control protocol

162.

Transport layer protocols deals with ____________ .

a)

Application to application communication

b)

Process to process communication

c)

Node to node communication

d)

Man to man communication

163.

The ports ranging from 49,152 to 65,535 can be used as temporary or private port numbers. They are called the ________ ports.

a)

well-known

b)

registered

c)

dynamic

d)

User ports

164.

Which of the followings is a transport layer protocol?

a)

Stream control transmission protocol

b)

Internet control message protocol

c)

Neighbor discovery protocol

d)

Dynamic host configuration protocol

165.

The field is used to detect errors over the entire user datagram?

a)

UDP header

b)

source port

c)

checksum

d)

destination port

166.

A port address in TCP/IP is ______ bits long. How many bits long is the port address in TCP/IP

a)

32

b)

48

c)

16

d)

None of these

167.

______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.?

a)

TCP

b)

UDP

c)

UDP

d)

UDP

168.

The_________ layer is responsible for the delivery of a message from one process to another.

a)

physical

b)

transport

c)

network

d)

none of the mentioned

169.

To deliver a message to the correct application running on a host, the _______ address must be consulted.

a)

port

b)

IP

c)

physical

d)

socket

170.

Which of the following services uses TCP?

a)

DHCP

b)

SMTP

c)

SIP

d)

RTP

171.

Which of the following layer is responsible for process to process delivery?

a)

Transport layer

b)

Network layer

c)

Presentation layer

d)

Data link layer

172.

Which one of the following protocols does the transport layer use for communication over the Internet?

a)

TCP

b)

UDP

c)

TCP and UDP

d)

IP

173.

In FTP protocol, a client contacts a server using ______ as the transport protocol.

a)

Transmission control protocol

b)

User datagram protocol

c)

Datagram congestion control protocol

d)

Stream control transmission protocol

174.

Which of the following statements is true for the TCP?

a)

connection oriented protocol

b)

uses a three way handshake to establish a connection

c)

receives data from application as a single stream

d)

all of the mentioned

175.

An endpoint of an inter-process communication flow across a computer network is known as:

a)

socket

b)

pipe

c)

pipe

d)

none of the mentioned

176.

Socket-style API for windows is known as?

a)

wsock

b)

winsock

c)

wins

d)

None of these

177.

What is the main advantage of UDP?

a)

More overload

b)

Reliable

c)

Low overhead

d)

Fast

178.

A _____ is a TCP name for a transport service access point

a)

port

b)

pipe

c)

node

d)

node

179.

In frame relay networks, extended address is used ________.

a)

for error detection

b)

to increase the range of data link connection identifiers

c)

for encryption

d)

for error recovery

180.

An attempt to make a computer resource unavailable to its intended users is called ______

a)

Denial-of-service attack

b)

Virus attack

c)

Worms attack

181.

Which of following protocols provides a reliable communication?

a)

TCP

b)

IP

c)

UDP

d)

HTTP

182.

The _______ provides a connection-oriented reliable service for sending messages?

a)

TCP

b)

IP

c)

UDP

d)

All of the mentioned

183.

Which of the following protocol is/are defined in Transport layer?

a)

FTP

b)

TCP

c)

UDP

d)

TCP and UDP

184.

What does the port number in a TCP connection specify?

a)

It specifies the communication process on the two end systems

b)

It specifies the quality of the data & connection

c)

It specify the size of data

d)

It specify the type of data

185.

What is the typical range of Ephemeral ports?

a)

1 to 80

b)

1 to 1024

c)

80 to 8080

d)

1024 to 65535

186.

What is the purpose of the PUSH flag in the TCP header?

a)

Typically used to indicate end of message

b)

Typically used to indicate beginning of message

c)

Typically used to push the message

d)

Typically used to indicate stop the message

187.

Which of the followings is not an application layer protocol?

a)

HTTP

b)

SMTP

c)

FTP

d)

TCP

188.

The datagram at the application layer is called?

a)

Packet

b)

Message

c)

Segment

d)

Frame

189.

Which one of the following is an architecture paradigms?

a)

Peer to peer

b)

Client-server

c)

Both Peer to peer and Client-server

d)

HTTP

190.

The File Transfer Protocol is built on __________

a)

data centric architecture

b)

service oriented architecture

c)

client server architecture

d)

connection oriented architecture

191.

Telnet protocol is used to establish a connection to __________

a)

TCP port number 21

b)

TCP port number 23

c)

TCP port number 23

d)

TCP port number 25

192.

Which of the following statements is true for the E-mail?

a)

Loss-tolerant application

b)

Bandwidth-sensitive application

c)

Elastic application

d)

None of mentioned

193.

FTP is built on _____ architecture

a)

Client-server

b)

P2P

c)

Data centric

d)

Service oriented

194.

What FTP is stand for?

a)

Fine Transfer Protocol

b)

File Transfer Protocol

c)

First Transfer Protocol

d)

Fast Transfer Protocol

195.

All telnet operations are sent as ________

a)

4 bits

b)

8 bits

c)

16 bits

d)

32 bits

196.

Which of the following is a time-sensitive service?

a)

File transfer

b)

File download

c)

E-mail

d)

Internet telephony

197.

Transport services available to applications in one or another form?

a)

Reliable data transfer

b)

Timing

c)

Security

d)

All of the mentioned

198.

Which application layer protocol does the email service use?

a)

SMTP

b)

HTTP

c)

FTP

d)

SIP

199.

The ____________ translates internet domain and host names to IP address.

a)

Domain name system

b)

Routing information protocol

c)

Network time protocol

d)

Internet relay chat

200.

Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?

a)

HTTP

b)

FTP

c)

TELNET

d)

TCP

201.

Application layer protocol defines?

a)

Types of messages exchanged

b)

Message format, syntax and semantics

c)

Rules for when and how processes send and respond to messages

d)

All of the mentioned

202.

What is the ASCII encoding of binary data called?

a)

Base 64 encoding

b)

Base 32 encoding

203.

Which one of the following protocol delivers/stores mail to reciever server?

a)

Simple mail transfer protocol

b)

Post office protocol

204.

Which one of the following is an internet standard protocol for managing devices on IP network?

a)

Dynamic host configuration protocol

b)

Simple network management protocol

c)

Internet message access protocol

d)

Media gateway protocol

205.

Which one of the following is not an application layer protocol?

a)

media gateway protocol

b)

dynamic host configuration protocol

c)

resource reservation protocol

d)

session initiation protocol

206.

When displaying a web page, what protocol is used by the application layer ?

a)

HTTP protocol

b)

FTP protocol

c)

SMTP protocol

d)

TCP protocol

207.

SMTP defines _______ .

a)

message transport

b)

message encryption

208.

An email client needs to know the _________ of its initial SMTP server

a)

IP address

b)

MAC address

209.

When the mail server sends mail to other mail servers it becomes ___

a)

SMTP server

b)

SMTP client

210.

Which of the following TCP ports is used by SMTP?

a)

24

b)

35

c)

25

211.

Expansion of SMTP is ________What does SMTP stand for?

a)

Simple Mail Transfer Protocol

b)

Simple Message Transfer Protocol

212.

Which of the following is an application layer service?

a)

Network virtual terminal

b)

File transfer, access, and management

c)

Mail service

d)

All of the mentioned

213.

SMTP is not used to deliver messages to______?

a)

user’s email server

b)

user’s mailbox

c)

user’s word processor

d)

user’s email client

214.

If you have to send multimedia data over SMTP it has to be encoded into?

a)

Binary

b)

Signal

c)

ASCII

d)

ASCII

215.

File Transfer Protocol (FTP), uses the well-known port 21 is used for the control connection and port 20 for the :

a)

Data Rate

b)

Data Connection

c)

Data Protocol

216.

How many wires does a CAT5 UTP cable contain?

a)

6

b)

7

c)

8

d)

9

217.

The Physical layer of the OSI model is _____

a)

First layer

b)

Fifth layer

c)

Sixth layer

218.

What is the color code for the T568A standard?

a)

White Green, Green, White Orange, Orange, White Blue, Blue, White Brown,

Brown.

b)

White Green, Green, White Blue, Blue, White Orange, Orange, White Brown,

Brown.

c)

White Green, Green, White Orange, Blue, Orange, White Blue, White Brown,

Brown.

d)

White Green, Green, White Orange, Blue, White Blue, Orange, White Brown,

Brown.

219.

Which network service uses record types such as A, NS, AAAA, and MX in order

to provide services?

a)

Email

b)

File

c)

Web

d)

DNS

220.

What is the binary sequence for the polynomial arithmetic x^7 + x^6 + x^5 + x^2 +

1?

a)

11011101

b)

11100111

c)

11101101

d)

11100101

221.

How many usable IP addresses are available on the 192.168.1.0/27 network?

a)

256

b)

254

c)

62

d)

30

222.

Given the network address 192.168.1.0 and the subnet mask 255.255.255.192.

How many subnets do we have?

a)

4

b)

256

c)

62

d)

30

223.

Which of the following device is used to connect two different networks?

a)

Hub

b)

Switch

c)

Repeater

d)

Router

224.

The range of first octets in a class B IP address is _____.

a)

1 - 126

b)

126 - 190

c)

128 - 191

d)

128 - 223

225.

Referring to networking cables, what does UTP stand for?

a)

Unshielded Twisted Pair

b)

UltraNet Twin Parity

226.

Bluetooth is an example of _____

a)

Local Area Network

b)

Personal Area Network

227.

The TTL field has value 12. How many maximum routers can process this

datagram?

a)

10

b)

11

c)

12

228.

Which Ethernet cable is fastest?

a)

Cat 5.

b)

Cat 5e.

c)

Cat 6.

d)

Cat 6a

229.

Telnet uses _____ protocol for data connection.

a)

TCP

b)

UDP

230.

The Bluetooth technologies used in _____

a)

Wireless keyboard

b)

All of the mentioned

231.

What is IoT?

a)

Internet of Technology

b)

Incorporate of Things

c)

Internet of Things

232.

A data unit on a data link layer is known as ______________.

a)

Bit

b)

Frame

c)

Packet

233.

Which OSI layer is providing end-to-end communication with reliable service?

a)

Session layer

b)

Transport layer

234.

Given a 7-bit information frame (0, 1, 0, 1, 1, 0, 1), what is the even parity bit?

a)

1

b)

0

235.

Which of these is not an edge device?

a)

PC

b)

Servers

c)

Switch

236.

For a 10Mbps Ethernet link, if the length of the packet is 32 bits, the transmission

delay is _____ µs (microseconds)

a)

320

b)

3.2

237.

Which frame field is used by a destination node to detect the transmitted data

signal has not been changed by interference, distortion, or signal loss?

a)

Transport layer error check field

b)

Error correction process field

c)

Frame check sequence field

238.

Which subnet would include the address 192.168.1.96?

a)

192.168.1.32/27

b)

192.168.1.32/28

c)

192.168.1.64/29

d)

192.168.1.64/26

239.

Which type of server relies on record types such as A, NS, AAAA, and MX in

order to provide services?

a)

Email

b)

File

c)

Web

d)

DNS

240.

A network administrator is adding a new LAN to a branch office. The new LAN

must support 200 connected devices. What is the smallest network mask that the

network administrator can use for the new network?

a)

255.255.255.224

b)

255.255.255.240

c)

255.255.255.240

d)

255.255.255.0

241.

What technique is used with UTP cable to help protect against signal interference

from crosstalk?

a)

Terminating the cable with special grounded connectors

b)

Terminating the cable with special grounded connectors

c)

Terminating the cable with special grounded connectors

d)

Encasing the cables within a flexible plastic sheath

242.

Refer to the exhibit. If host A sends an IP packet to host B, what will the

destination address be in the frame when it leaves host A?

a)

AA:AA:AA:AA:AA:AA

b)

CC:CC:CC:CC:CC:CC

c)

BB:BB:BB:BB:BB:BB

243.

Which of the following is NOT a benefit of computer networks?

a)

Resource sharing

b)

Improved communication

c)

Increased security

d)

Cost savings

244.

What type of device is used to connect multiple networks together?

a)

Router

b)

Switch

c)

Hub

245.

Which of the following is NOT a characteristic of digital signals?

a)

Continuous wave

b)

Discrete levels

c)

Binary values

d)

More immune to noise

246.

Which of the following is NOT a type of error that can occur in data transmission?

a)

Bit errors

b)

Frame errors

c)

Collision errors

d)

All of the above are types of errors

247.

Which of the following is NOT a characteristic of fiber optic cable?

a)

High bandwidth

b)

High attenuation

248.

A single channel is shared by multiple sources of signals by ______

a)

Analog modulation

b)

Digital modulation

c)

Multiplexing

d)

Phase modulation

249.

Which of the following is a common framing technique used in the data link

layer?

a)

Bit stuffing

b)

Frequency modulation

c)

Differential Manchester encoding

250.

Which of the following is NOT a type of data link layer protocol?

a)

Point-to-Point Protocol (PPP)

b)

Ethernet

c)

Transmission Control Protocol (TCP)

251.

Which of the following is NOT a characteristic of the data link layer in the OSI

model?

a)

Provides end-to-end delivery of data

b)

Transmits frames over a communication channel

c)

Controls access to the physical transmission medium

d)

Provides error detection and correction mechanisms

252.

Which of the following is a data link protocol?

a)

Ethernet

b)

Point to point protocol

c)

HDLC

d)

All of the mentioned

253.

Which of the following is NOT a type of network access method?

a)

Polling

b)

Token passing

c)

Circuit switching

254.

Frame has error detection at the _____

a)

Physical layer

b)

Data link layer

c)

Network layer

255.

Which of the following is NOT a common protocol used in the Network Layer?

a)

ICMP

b)

TCP

c)

TCP

256.

Which layer of the OSI model is responsible for end-to-end communication

between applications?

a)

Physical layer

b)

Data link layer

c)

Network layer

d)

Transport layer