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Cơ bản về Mạng và Tầng Ứng dụng (Câu 1-14)

Total questions: 150

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

"Flow control" means what?

a)

Sender avoids overflowing receiver buffer

b)

Devices can establish a connection

c)

Data flows bidirectionally on one link

d)

Packets are sent in fixed order

2.

Two devices are said to communicate when what occurs?

a)

A process on one device exchanges with the other

b)

All options are wrong

c)

Both devices run the same network protocol

d)

Both devices run the same application

3.

In the shown TCP segment, what is the Acknowledgement Number in the ACK reply?

a)

1

b)

1460

c)

1109646

d)

1109645

4.

ADSL stands for what?

a)

Asymmetric Dual Subscriber Line

b)

Asymmetric Digital Subscriber Line

c)

Asymmetric Dual System Line

d)

Asymmetric Digital System Line

5.

Application layer provides what kind of communication service?

a)

All are correct

b)

End to end

c)

Client to end

d)

Client to server

6.

Application layer protocols do which of the following?

a)

Define message types exchanged

b)

Specify message structure and syntax

c)

Set rules for sending and receiving

d)

All are correct

7.

ASCII used to encode binary data is called what?

a)

Base 8

b)

Base 16

c)

Base 32

d)

Base 64

8.

What does a channel’s bandwidth mean?

a)

Capacity to carry data on a channel

b)

The OSI layer used in a local network

c)

Connecting a computer to a local network

d)

All are correct

9.

A bridge operates at which OSI layer?

a)

7

b)

4

c)

3

d)

2

10.

What is a bridge commonly used for?

a)

All are correct

b)

Increasing network throughput

c)

Dividing LANs from each other

d)

Connecting LANs together

11.

Which are symptoms of network congestion?

a)

Packet loss

b)

Both answers are wrong

c)

Both answers are correct

d)

Large latency

12.

Which transport protocols are used on the Internet?

a)

UDP

b)

TCP

c)

Both answers are wrong

d)

Both answers are correct

13.

Telnet, POP3, SSH, and SMTP belong to which layer of the Internet protocol stack?

a)

Network

b)

Application

c)

Transport

d)

All are correct

14.

Which are principles of the Data Link layer services?

a)

Both answers are wrong

b)

Error detection and correction

c)

MAC addressing

d)

Both answers are correct

15.

Which situation most commonly causes unintended IP packet loss at a router?

a)

Application refuses to accept data

b)

Receiver TCP buffer overflow

c)

Buffer overflow at the router

d)

Application has no data to send

16.

Which set lists typical UDP-based applications?

a)

Web browsing, VoIP, DHCP

b)

Streaming video, VoIP, SNMP

c)

DNS, video streaming, VoIP, DHCP

d)

Web browsing, email, file transfer

17.

Which switching method reserves a dedicated path and resources for the entire session?

a)

Cell switching

b)

Circuit switching

c)

Packet switching

d)

All listed methods are wrong

18.

Which communication method provides a dedicated channel that remains idle when not actively used?

a)

All listed methods are correct

b)

Circuit Switching

c)

Packet Switching

d)

Multiprotocol Label Switching

19.

Which device is hardware-based rather than primarily software?

a)

Router

b)

Gateway

c)

Firewall

d)

Modem

20.

Which statement correctly describes broadcast delivery?

a)

Send packets to all except one host

b)

Send packets to some hosts except a few

c)

Send packets to one host

d)

Send packets to all hosts

21.

If an IP header shows fragment offset 210 and the MF flag is 0, what does that indicate?

a)

Unfragmented packet of size 210 bytes

b)

This is the last fragment of the original packet

c)

Last fragment with size 210 bytes

d)

Packet was fragmented into 1680-byte pieces

22.

In the shown header, the next packet from src 81.209.179.69 to dst 192.168.124.100 will have which ACK number?

a)

ACK number equals 352

b)

ACK number equals 351

c)

Sequence number equals 352

d)

All listed statements are wrong

23.

A Wireshark capture labeled telnet [SYN], RST, ACK indicates what about the session state?

a)

Restored

b)

Open

c)

Reset

d)

Closed

24.

In the Wireshark screenshot for packets 28–31, which process is occurring?

a)

Connection close

b)

Connection open

c)

File close

d)

File transfer

25.

Which statement best contrasts circuit switching with packet switching?

a)

Circuit ensures fixed path; packet uses shared paths

b)

Circuit uses shared routers; packet reserves bandwidth

c)

Circuit delays are variable; packet delays are constant

d)

Circuit is connectionless; packet is connection-oriented

26.

Given the MAC address table shown, PC1 sends a frame to PC3. What will the switch do with the frame?

a)

Forward out all ports except port 4

b)

Drop the frame entirely

c)

Forward out interface 2 only

d)

Flood out all switch ports

27.

In an SMTP client session, arrange the typical command sequence.

a)

HELO, RCPT TO, DATA, QUIT, MAIL FROM

b)

HELO, MAIL FROM, RCPT TO, DATA, QUIT

c)

HELO, MAIL FROM, RCPT TO, DATA, QUIT

d)

HELO, DATA, MAIL FROM, QUIT, RCPT TO

28.

Which statement correctly describes pipeline protocol characteristics?

a)

All of the above

b)

Buffers store data at sender and/or receiver

c)

Sender can transmit multiple packets without waiting

d)

Sequence numbers must strictly increase

29.

Choose the accurate statement about Multiplexing and Demultiplexing.

a)

Multiplexing at receiver, Demultiplexing at receiver

b)

Multiplexing at sender, Demultiplexing at receiver

c)

Multiplexing at sender, Demultiplexing at sender

d)

Multiplexing at receiver, Demultiplexing at sender

30.

Which standard below is NOT a wireless technology?

a)

IEEE 802.11a

b)

Bluetooth

c)

IEEE 802.11g

d)

IEEE 802.3

31.

Which function is NOT performed by the Data Link layer?

a)

Channel coding

b)

Framing

c)

Error control

d)

Flow control

32.

Which of the following is NOT a Network layer function?

a)

Routing

b)

Internetworking

c)

Congestion control

d)

All are incorrect

33.

Which function does NOT belong to the Network layer?

a)

IP address and domain name mapping

b)

Path selection across internetworks

c)

Packet forwarding between networks

d)

None of the above

34.

Which function moves packets from an input interface to the appropriate output of a router?

a)

NAT

b)

Forwarding

c)

Routing

d)

Encapsulation

35.

Which dotted decimal range represents Class B addresses?

a)

128.x.x.x–191.x.x.x

b)

1.x.x.x–126.x.x.x

c)

240.x.x.x–252.x.x.x

d)

192.x.x.x–223.x.x.x

36.

Which IP class is used for Multicast addressing?

a)

Class A

b)

Class B

c)

Class C

d)

Class D

37.

For Class C, the first 8 bits of the first octet in binary are what?

a)

All answers are incorrect

b)

1011 1111

c)

1101 1111

d)

1000 0000

38.

For Class B, the first 8 bits of the first octet in binary are what?

a)

All answers are incorrect

b)

1101 1111

c)

1100 0000

d)

1000 0000

39.

In which FTP mode does the client passively wait while the server opens the data connection?

a)

Active

b)

None of the above

c)

Passive

d)

Hybrid

40.

Client downloads 5 files from an FTP server. How many connections are needed?

a)

3

b)

4

c)

5

d)

6

41.

Which protocol is used by a client to determine duplicate IP addresses?

a)

Broader gateway protocol

b)

Address resolution protocol

c)

Internet relay chat

d)

All statements are wrong

42.

How many layers are in the OSI model?

a)

5

b)

7

c)

4

d)

6

43.

How many layers are in the TCP/IP model?

a)

6

b)

5

c)

7

d)

4

44.

Which tool allows measuring delay when sending packets?

a)

Traceroute

b)

Packet sniffing

c)

Ping

d)

Scan

45.

CSMA (Carrier Sense Multiple Access) is which form?

a)

Channel planning by time slots

b)

Random access

c)

Token passing among nodes

d)

Channel planning by frequency slots

46.

Data at the application layer is called what?

a)

Data gram

b)

All are wrong

c)

Packet

d)

Message

47.

DHCP client sends data to DHCP server over which UDP port?

a)

66

b)

69

c)

67

d)

68

48.

DHCP client and server within one subnet use which method to communicate?

a)

TCP broadcast

b)

UDP unicast

c)

TCP unicast

d)

UDP broadcast

49.

DHCP is used for which IP versions?

a)

Both are wrong

b)

Both are correct

c)

IP version 6

d)

IP version 4

50.

DHCP stands for which of the following?

a)

Dynamic Hyper Control Protocol

b)

Dynamic Host Configuration Protocol

c)

Dynamic Hyper Configuration Protocol

d)

Dynamic Host Control Protocol

51.

DHCP is a service that provides which of the following?

a)

Both are wrong

b)

Both are correct

c)

IP address

d)

MAC address

52.

Can a DHCP server provide IP addresses in which modes?

a)

Static

b)

Automatic

c)

Dynamic

d)

All are correct

53.

What is DHCP snooping?

a)

DHCP request encryption

b)

All are wrong

c)

DHCP allocation algorithm

d)

Advanced technique to enhance DHCP security

54.

Which network service resolves domain names to IP addresses?

a)

DNS

b)

FTP

c)

DHCP

d)

HTTP

55.

Which service helps find an IP address when browsing the Internet?

a)

HTTP

b)

FTP

c)

DNS

d)

POTS

56.

Which service below requires real-time communication?

a)

TELEPHONE

b)

MAIL

c)

TELNET

d)

FTP

57.

DNS is the abbreviation of which phrase?

a)

Dynamic Network System

b)

Dynamic Name System

c)

Domain Name System

d)

Domain Network Service

58.

Which port does DNS use?

a)

21

b)

53

c)

80

d)

23

59.

Based on the Wireshark screenshot, which statement is correct?

a)

All statements are correct

b)

Packets 1,2,3 indicate connection start

c)

Packet 2 uses a proxy service

d)

Packet 3 uses the shtml protocol

60.

From the header view shown, what is the window size used for flow control in this TCP segment?

a)

24

b)

8760

c)

4

d)

1460

61.

From the header view shown, which TCP segment would be sent next in response to this one?

a)

SYN

b)

FIN

c)

URG

d)

ACK

62.

Which is a characteristic of a pure P2P architecture?

a)

Devices connect intermittently and change IPs

b)

No active central server

c)

Direct contact between any endpoints

d)

All of the above

63.

Which IP address range is called APIPA?

a)

169.254.0.1 to 169.254.255.255

b)

169.254.0.1 to 169.254.0.254

c)

169.254.0.1 to 169.254.0.255

d)

169.254.0.1 to 169.254.255.254

64.

Which protocol does not belong to the application layer?

a)

FTP

b)

TELNET

c)

ICMP

d)

SMTP

65.

Which protocol is at the application layer?

a)

Both answers are correct

b)

Both answers are wrong

c)

TCP

d)

FTP

66.

Which application-layer protocol helps a client retrieve mail?

a)

Both answers are correct

b)

Pop3

c)

Simple Mail Transfer Protocol

d)

Both answers are wrong

67.

Which application-layer protocol helps send and store mail on a server?

a)

Both answers are correct

b)

Pop3

c)

Both answers are wrong

d)

Simple Mail Transfer Protocol

68.

Which of the following is an architectural model?

a)

Both a and b are correct

b)

All are wrong

c)

Peer to peer

d)

Client to server

69.

Which subnet mask matches a Class C address block?

a)

255.0.255.255

b)

255.0.0.255

c)

255.255.255.0

d)

255.255.25.0

70.

Use Dijkstra’s algorithm on the shown router graph starting from node u. At initialization (step 0), what are D(v), D(w), D(x), D(y), D(z)?

a)

3, 6, 7, ∞, ∞

b)

6, 6, 2, 1, 2

c)

3, 6, 6, ∞, ∞

d)

3, 4, 7, 6, 5

71.

Which command helps find the IP address of a website from a client machine?

a)

ipweb

b)

ipconfig

c)

nslookup

d)

webconfig

72.

To determine the IP class of an address, which component is examined?

a)

Subnet mask

b)

Dot count

c)

DHCP address

d)

Leading octet

73.

Which protocol can allocate IP addresses dynamically to hosts?

a)

DHCP

b)

FTP

c)

HTTP

d)

DNS

74.

Which mechanism reduces external Internet traffic for an organization by serving repeated content locally?

a)

Cookies

b)

Firewall

c)

Web caching

d)

Proxy

75.

To deliver a message to the correct application on a host, which address must be targeted?

a)

Port

b)

MAC address

c)

None are correct

d)

IP address

76.

For simultaneous data transmission at both ends on the data link, how must the nodes be configured?

a)

Both full-duplex mode

b)

One full-duplex, one half-duplex

c)

Both half-duplex mode

d)

Both allow simultaneous transmission

77.

When initiating a TCP connection, which flag is set in the first packet sent by the client?

a)

SYN

b)

SEQ

c)

ACK

d)

FIN

78.

Using checksum for bit-error detection and ACK/NAK feedback for reliability, what is a limitation of this scheme?

a)

Checksum only detects loss, not errors

b)

If ACK/NAK is lost, sender can’t confirm

c)

All statements are false

d)

No issue, reliable delivery guaranteed

79.

A broadcast IP address has which host field pattern?

a)

Host_ID all zeros

b)

Host_ID all ones

c)

Net_ID all zeros

d)

Net_ID all ones

80.

What is the binary form of the first 8 bits of the last address in class A?

a)

0111 1111

b)

1111 0000

c)

1000 001

d)

All are wrong

81.

What is the binary pattern of the first 8 bits of the first address in class C?

a)

1110 0000

b)

1100 0000

c)

11111 0000

d)

1111 0000

82.

What is the binary pattern of the first 8 bits of the last address in class C?

a)

1101 1111

b)

1111 1111

c)

All are wrong

d)

1110 1111

83.

Địa chỉ IP cuối cùng trong một đường mạng thể hiện điều gì?

a)

Địa chỉ ip

b)

Địa chỉ net

c)

Địa chỉ broadcast

d)

Địa chỉ host

84.

Địa chỉ IP đầu tiên của class lớp B có 8 bit đầu tiên có dạng là?

a)

1011 1111

b)

Tất cả đều sai

c)

1001 1111

d)

1000 0000

85.

Địa chỉ IP nào sau đây là địa chỉ broadcast?

a)

255.255.255.0

b)

0.0.0.0

c)

255.255.255.255

d)

255.255.0.0

86.

Địa chỉ IP version 6 có bao nhiêu bit?

a)

64

b)

128

c)

96

d)

32

87.

Địa chỉ lớp nào cho phép mượn 14 bits để chia Subnet?

a)

Lớp A hoặc lớp B

b)

Lớp A

c)

Lớp B

d)

Lớp C

88.

Địa chỉ MAC broadcast có giá trị là bao nhiêu?

a)

FF-FF-FF-FF-FF-FF

b)

FF-FF-FF-FF-FF-FF-FF

c)

FF-FF-FF-FF-FF

d)

FF-FF-FF-FF

89.

Địa chỉ MAC nào sau đây hợp lệ?

a)

1A-2F-BB-76-09-AD

b)

1A-2F-BB-76-0G-AD

c)

1A-2H-BB-76-09-AD

d)

1A-2H-BH-76-09-AD

90.

Địa chỉ Multicast là địa chỉ IP có octet đầu tiên thuộc dãy?

a)

192..223

b)

240..255

c)

224..239

d)

172..191

91.

Địa chỉ nào sau đây là một địa chỉ Unicast và có thể gán cho một host trên mạng?

a)

172.31.128.255/18

b)

224.1.5.2B. FF

c)

192.168.24.59/30

d)

FF.FFFF.FFFF

92.

Địa chỉ network private lớp A là địa chỉ nào sau đây?

a)

172.16.0.0

b)

10.0.0.0

c)

192.168.0.0

d)

172.31.0.0

93.

Địa chỉ network private lớp B có dạng nào sau đây?

a)

192.168.0.0

b)

10.0.0.0

c)

172.16.0.0 đến 172.31.0.0

d)

Tất cả đều đúng

94.

Địa chỉ network private lớp C có dạng nào sau đây?

a)

192.168.0.0

b)

172.31.0.0

c)

172.16.0.0

d)

10.0.0.0

95.

Điều gì là đúng khi nói về smtp sau đây?

a)

SMTP và HTTP có chung một kí hiệu kết thúc message

b)

MAIL FROM: và From: là một

c)

2 Đáp án đều sai

d)

2 Đáp án đều đúng

96.

Điều gì sau đây là KHÔNG đúng về virtual circuit?

a)

Tất cả các router từ nguồn đến đích phải lưu lại trạng thái cho từng kết nối đi ngang qua.

b)

Đòi hỏi phải tạo kết nối trước.

c)

Mỗi packet có số hiệu VC identifier.

d)

Packets được forwarded dựa trên địa chỉ máy đích (destination host address).

97.

Điều kiện để giao thức Slotted ALOHA hoạt động là?

a)

Tất cả các frame có cùng kích thước

b)

Tất cả đều đúng

c)

Thời gian được chia thành các slot có kích thước bằng nhau

d)

Các node được đồng bộ hóa

98.

Which statement about the following connection is correct? GET /cs453/index.html HTTP/1.1 Host: gai.cs.umass.edu User-Agent: Mozilla/5.0 ( Windows;U; Windows NT 5.1; en-US; rv:1.7.2) Gec ko/20040804 Netscape/7.2 (ax) Accept:text/xml, application/xml, application/xhtml+xml, text /html;q=0.9, text1/plain;q=0.8,image/png,/;q=0.5 Acce2pt-Language: en-us,en;q=0.5 Accept-Encoding: zip,deflate Accept-Charset: ISO -8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection:keep-alive

a)

All statements are false

b)

The host path is /cs456/index.html

c)

The IP address is included as 20040804

d)

The connection type shown is persistent

99.

Which statement is NOT true about web caches?

a)

It reduces response time for users

b)

A web cache has no separate memory space

c)

It stores the most frequently copied objects

d)

It operates under a client-server model

100.

Which statement is correct about applications HTTP, SMTP, FTP, BitTorrent?

a)

All use peer-to-peer architectures

b)

All use transport-layer services

c)

Two statements are correct

d)

All statements are false

101.

Which statement is true about TCP congestion control?

a)

Two statements are false

b)

During CA, loss via DupAck triggers slow start

c)

Two statements are correct

d)

During slow start, timeout loss triggers CA

102.

Which statement is correct about circuit switching service?

a)

Always follows a fixed route

b)

Requires a three-way handshake to connect

c)

Uses IP addresses for communication

d)

All statements are false

103.

Which statement is correct about the IP 172.16.0.0/12?

a)

Can be split into 16 subnets with equal hosts

b)

A public IP comfortable for intranets

c)

It is assignable only to computers

d)

Its broadcast address is 255.255.255.015

104.

Which statement is correct about class A addressing?

a)

Network 7 bits host 24 bits

b)

Network 15 bits host 16 bits

c)

Network 8 bits host 24 bits

d)

Network 16 bits host 16 bits

105.

Which statement is correct about class B addressing?

a)

Network 14 bits host 16 bits

b)

Network 16 bits host 16 bits

c)

Network 18 bits host 14 bits

d)

Network 16 bits host 14 bits

106.

Which statement is correct about class C addressing?

a)

Network 21 bits host 8 bits

b)

Network 24 bits host 8 bits

c)

Network 16 bits host 14 bits

d)

Network 18 bits host 14 bits

107.

Which statement is correct about the NAT protocol?

a)

All statements are true

b)

Saves IPv6 addresses

c)

Uses destination router port numbers

d)

Converts private IP to public

108.

Which statement is correct about NAT operation?

a)

All statements are true

b)

Translates private IP to public IP

c)

Designed to reduce IP version count

d)

Adds port information to reach destination router

109.

Which statement is correct about RDT 3.0?

a)

Two statements are false

b)

ACK checks lost packets and times out

c)

Sequence numbers 0,1 detect duplicates

d)

Two statements are correct

110.

Which statement is true about TCP (Buffer/Sequence)?

a)

Host A cannot exceed B’s receiver buffer

b)

Seq always increases by x+1

c)

TCP rwnd size never changes

d)

B does not ACK if no data to resend

111.

Which statement is correct about the TCP header?

a)

Packet seq is 38, 4 bytes means ACK 42

b)

Two statements are correct

c)

The header includes the rwnd field

d)

Two statements are false

112.

Điều nào sau đây là đúng khi nói về giao thức TCP?

a)

Tất cả đều đúng

b)

Trong giao thức TCP trường sequence number là một số có giới hạn

c)

Trong giao thức TCP ack đại diện cho thứ tự số byte

d)

Trong giao thức sequence number đại diện cho thứ tự số gói tin

113.

Điều nào sau đây là đúng khi nói về giao thức TCP?

a)

Tất cả đều đúng

b)

Sequence number là một số có giới hạn

c)

ACK đại diện cho thứ tự số byte

d)

Gói tiếp theo phải có seq x+1

114.

Điều nào sau đây là đúng khi nói về mô hình mạng LAN 192.168.3.0 và 192.168.1.0?

a)

Trong switch chứa record định tuyến qua đường mạng

b)

Trong router 2 có bảng định tuyến chứa địa chỉ mac

c)

Sử dụng lệnh ARP –a tại máy E luôn có MAC của máy A

d)

Tất cả đều sai

115.

Điều nào sau đây là đúng khi nói về mô hình mạng LAN/Router được cho?

a)

ARP -a tại máy E luôn có MAC của máy A

b)

Tất cả đều sai

c)

Switch chứa record định tuyến

d)

Router 2 có bảng định tuyến chứa MAC 99-...

116.

Điều nào sau đây là đúng khi nói về TCP?

a)

Rec window là một giá trị hằng số

b)

MSS là một giá trị hằng số

c)

Tất cả đều đúng

d)

Một kết nối truyền file sử dụng giao thức TCP có độ lớn giới hạn

117.

Điều nào sau đây là đúng khi nói về thuật toán forwarding của router?

a)

2 Đáp án đều sai

b)

2 Đáp án đều đúng

c)

Nếu không trùng phần nào trong forward table thì đi theo interface default

d)

So trùng phần bit trùng dài nhất

118.

Điều nào sau đây là đúng về các trường trong IPv4 header?

a)

Trường source port và destination port đại diện cho thông số port trong IP header

b)

Trường Flag có giá trị 000 khi gói tin là không bị fragment

c)

Tất cả đều đúng

d)

Trường identification là một trường số ID 32 bit

119.

Điều nào sau đây là đúng về các trường trong IPv4 header?

a)

Source/Des port nằm trong IP header

b)

Flag=000 khi không bị fragment

c)

Identification là trường ID 32 bit

d)

Tất cả đều đúng

120.

Điều nào sau đây là đúng về giao thức mạng?

a)

Là tập hợp quy tắc truyền thông

b)

Html là một giao thức mạng

c)

2 Đáp án đều đúng

d)

2 Đáp án đều sai

121.

Điều nào sau đây là đúng về HTTP?

a)

User yêu cầu trang web 3 ảnh thì nhận 4 response

b)

HTTP respone không bao giờ có message body rỗng

c)

2 web page khác nhau có thể truyền qua cùng kết nối persistent

d)

Kết nối nonpersistent có thể chứa nhiều web page khác nhau

122.

Điều nào sau đây là không đúng khi nói về web cache?

a)

Web cache có thể giảm thời gian phản hồi

b)

Web cache hoạt động theo mô hình client-server

c)

Web cache chứa đối tượng sao chép gần nhất

d)

Web cache không có không gian nhớ riêng

123.

Điều nào sau đây thuộc về cơ chế flow controll trong TCP?

a)

2 Đáp án đều sai

b)

Window size

c)

2 Đáp án đều đúng

d)

Maximum size segment(MSS)

124.

Độ dài lớn của datagram header IP vesion 6 có độ dài bao nhiêu?

a)

10 bytes

b)

20 bytes

c)

30 bytes

d)

40 bytes

125.

Đúng về giao thức chuyển mạch ảo và giao thức chuyển mạch gói?

a)

2 Đáp án đều đúng

b)

2 Đáp án đều sai

c)

Giao thức chuyển mạch ảo là giao thức phi kết nối tại tầng mạng

d)

Giao thức chuyển mạch gói là giao thức hướng kết nối

126.

Which statement correctly describes TCP congestion handling?

a)

Both statements are wrong

b)

Both statements are correct

c)

On timeout, reduce by half and increase linearly

d)

On dupack, reduce by half and increase linearly

127.

What information does an Ethernet frame header contain?

a)

MAC address

b)

Both are correct

c)

IP address

d)

Both are wrong

128.

What is a firewall in computer networks?

a)

A system designed to predict unauthorized access

b)

A system designed to block unauthorized access

c)

A hardware or software device inside the network path

d)

A hardware device placed outside the network path

129.

FTP is built on which model?

a)

P2P

b)

All are wrong

c)

Client to server

d)

Hybrid

130.

FTP stands for what?

a)

First transfer protocol

b)

File transfer protocol

c)

Fine transfer protocol

d)

All are wrong

131.

FTP listen connection uses which TCP port?

a)

20

b)

19

c)

21

d)

22

132.

FTP data transfer through TCP uses which port?

a)

20

b)

19

c)

22

d)

21

133.

A packet from source to destination passes 3 routers. Through how many interfaces and how many forwarding tables does it go?

a)

8 interfaces, 3 tables

b)

All are wrong

c)

3 interfaces, 3 tables

d)

3 interfaces, 2 tables

134.

Which value does not belong to the Network layer?

a)

Port des

b)

All are correct

c)

TOS

d)

IP source

135.

Which routing protocol below is a Distance-Vector protocol?

a)

Calculated

b)

BGP

c)

RIP

d)

OSPF

136.

What will CSMA/CD do upon detecting a transmission anomaly?

a)

Seize the medium by signaling nodes to pause

b)

Keep trying until congestion occurs then stop

c)

Continue transmitting while sending a jam signal

d)

Abort transmission and send a jam signal

137.

Which inter-domain routing protocol connects the Internet?

a)

IS-IS

b)

BGP

c)

RIP

d)

OSPF

138.

Which routing protocol uses Dijkstra’s algorithm?

a)

BGP

b)

OSPF

c)

Others

d)

RIP

139.

What does CSMA/CD stand for in English?

a)

Collision Sense Multiple Access/ Carrier Detection

b)

Collision Sense Multiple Access/ Carrier Detection

c)

Carrier Sense Multiple Access/ Collision Deterence

d)

Carrier Sense Multiple Access/ Collision Detection

140.

Which architecture is FTP built upon?

a)

Data center

b)

Distributed

c)

Client server

d)

Discrete

141.

How many connections does FTP use?

a)

4

b)

2

c)

1

d)

3

142.

Which capability is NOT provided by the IP protocol?

a)

Defining IP address

b)

Providing transport layer service

c)

Supporting error reporting

d)

Defining IP packet

143.

Point-to-Point Protocol (PPP) encapsulates which frames?

a)

Both statements are false

b)

Both statements are correct

c)

Ethernet frames in PPP frames

d)

PPP frames in Ethernet frames

144.

Which MAC approach partitions the channel into smaller pieces and allocates them exclusively to nodes?

a)

Channel partitioning

b)

Random access

c)

Round robin

d)

ALOHA

145.

Which protocol is used to send outgoing email?

a)

HTTP

b)

ICMP

c)

POP3

d)

SMTP

146.

Which protocol does NOT operate with a best-effort delivery mechanism?

a)

UDP

b)

TCP

c)

IP

d)

All are correct

147.

Which system resolves Internet domain names and host names to IP addresses?

a)

All are wrong

b)

Domain name system

c)

Internet control message system

d)

Dynamic system name control

148.

Which protocol allows a computer to remotely control another computer?

a)

Telnet

b)

TFTP

c)

All are wrong

d)

FTP

149.

Which protocol provides reliable, trustworthy connections for sending messages?

a)

IP

b)

All are correct

c)

UDP

d)

TCP

150.

Which protocol provides host-to-host connections?

a)

UDP

b)

All are correct

c)

TCP

d)

IP

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