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CNE part 1

Total questions: 101

Worksheet time: 51mins

Name
Class
Date
1.

Run command "ping 10.0.0.2", which of the following result shows the host 10.0.0.2 is reachable?

a)

Reply from 10.0.0.2: bytes=32 time<1ms TTL=64

b)

IP Address . . . . . . . . . : 10.0.0.2

c)

TCP localhost:4078 10.0.0.2:80 ESTABLISHED

d)

Default Gateway . . . . . . . . . : 10.0.0.2

2.

Which of the following systems provides circuit switching service?

a)

telephone system

b)

postal system

3.

Which of the following tools is a security scanner used to discover computers and services on a computer network?

a)

nmap

b)

ping

c)

netstat

d)

tracert

4.

Which of the following devices is more secure in term of network sniffing?

a)

Switch

b)

Hub

5.

If you ping fit.hanu.vn first time, where is the first place that your computer send the request?

a)

DNS server

b)

Web server

c)

DHCP server

d)

Application server

6.

What is the first byte range of a class B network address?

a)

128 --> 191

b)

0 --> 127

c)

1 --> 126

d)

192 --> 223

7.

Which of the following commands on Linux is used to test reachability of a remote host and show (the part of) the list of intermediary hops?

a)

traceroute

b)

tracert

c)

ping

d)

nmap

8.

Which of the following device is mainly designed to work at Data link layer?

a)

Switch

b)

Router

c)

Bridge

d)

Hub

9.

How far can a twisted pair cable be extended?

a)

100m

b)

5km

c)

50km

d)

500km

10.

A distributed network configuration in which all data/information pass through a central computer is...

a)

star network

b)

Point-to-point network

c)

bus network

d)

ring network

11.

What is the first byte range of a class C network address?

a)

192 --> 223

b)

128 --> 191

c)

1 --> 126

d)

0 --> 127

12.

Which of the following commands on Window is used to test reachability of a remote host and show (the part of) the list of intermediary hops?

a)

traceroute

b)

tracert

c)

ping

d)

nmap

13.

Which of the following device is mainly designed to work at Network layer?

a)

Router

b)

Switch

c)

Bridge

d)

Hub

e)

Repeater

14.

Internet-like networks within an enterprise.

a)

Intranets

b)

Switching alternating

c)

Inter organizational networks

d)

Extranets

15.

Which type of cable is often used to connect a computer and a switch?

a)

Copper straight-through cable

b)

Copper cross-over cable

c)

Fiber optic cable

d)

Coaxial cable

16.

In which layer does repeater work?

a)

Physical layer

b)

Data Link layer

c)

Transport layer

d)

Network layer

17.

What is the first byte range of a class A network address?

a)

1 --> 127

b)

0 --> 127

c)

192 --> 223

d)

191 --> 224

18.

In TCP/IP model, node-to-node delivery is in...

a)

Data Link layer

b)

Physical layer

c)

Transport layer

d)

Network layer

19.

The physical map of a computer network is known as...

a)

Topology

b)

Segment

c)

Backbone

d)

Protocol

20.

Which of the following tools displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics.

a)

netstat

b)

nmap

c)

tracert

d)

ping

21.

In TCP/IP model, which of the following information belongs to the Data link layer?

a)

MAC address

b)

Logical address

c)

IP address

d)

Port number

22.

Which type of cable is often used to connect a router and a switch?

a)

Copper straight-through cable

b)

Copper cross-over cable

c)

Fiber optic cable

d)

Coaxial cable

23.

Which type of cable is often used to connect 2 routers together?

a)

Copper cross-over cable

b)

Copper straight-through cable

c)

Coaxial cable

d)

Fiber optic cable

24.

Which of the following protocols uses link state routing algorithm?

a)

RIP

b)

OSPF

c)

BGP

d)

PGP

25.

In TCP, the receiver merges the data based on...

a)

Acknowledgement number

b)

Port number

c)

Sequence number

d)

Arriving order

26.

What is default port of SMTP service?

a)

80

b)

53

c)

25

d)

110

27.

Which of the following commands shows the path from local host to a remote host?

a)

tracert

b)

ping

c)

nslookup

d)

nmap

28.

The correct order of layers in OSI model is…

a)

Physical layer, Data Link layer, Network layer, Transport layer, Session layer, Presentation layer Application layer

b)

Physical layer, Network layer, Data Link layer, Session layer, Transport layer, Presentation layer, Application layer

c)

Physical layer, Session layer, Data Link layer, Transport layer, Presentation, Network layer, Application layer

d)

Physical layer, Data Link layer, Network layer, Presentation layer, Application layer, Session Layer, Transport layer

29.

What is default port of FTP service?

a)

53

b)

25

c)

80

d)

21

30.

In TCP/IP model, which of the following information belongs to the Network layer?

a)

Port number

b)

IP address

c)

Physical address

d)

MAC address

31.

What is a correct netmask for a class C network?

a)

255.0.0.0

b)

255.0.0.0

c)

255.255.0.0

d)

255.255.255.0

32.

In UDP, the receiver merges the data based on...

a)

Arriving order

b)

Acknowledgement number

c)

Port number

d)

Sequence number

33.

Which of the following services is connection-oriented?

a)

UDP

b)

TCP

34.

In TCP/IP model, which of the following information belongs to the Transport layer?

a)

Physical address

b)

IP address

c)

MAC address

d)

Port number

35.

What is the command to set up static routing in Packet tracer?

a)

ip address

b)

network ...

c)

router ...

d)

ip route ..

36.

What application layer protocol is commonly used to support for file transfers between a client and a server?

a)

Telnet

b)

HTTP

c)

HTTP

d)

FTP

37.

Which of the following protocols is used as inter-AS routing?

a)

PGP

b)

PGP

c)

OSPF

d)

BGP

38.

On which of the following protocols in Transport layer is SNMP (Simple Network Management Protocol) based?

a)

UDP

b)

TCP

39.

Which of the following describes the function of a WAN?

a)

provides connectivity over a large geographic area

b)

connects multiple networks in a single building

c)

connects multiple networks in a single building

d)

connects peripherals in a single location

40.

What is the automated service that matches resource names with the required IP address?

a)

SSH

b)

DNS

c)

HTTP

d)

Telnet

41.

You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?

a)

255.240.0.0

b)

255.248.0.0

c)

255.252.0.0

d)

255.254.0.0

42.

On which layer does FTP work?

a)

On which layer does FTP work?

b)

Application layer

c)

Transport layer

d)

Network layer

43.

In TCP/IP model, host-to-host delivery is in...

a)

Data Link layer

b)

Network layer (/ end- to- end delivery)

c)

Transport layer

d)

Physical layer

44.

The correct order of layers in TCP/IP model is...

a)

Physical layer, Network layer, Data Link layer, Transport layer, Application layer

b)

Physical layer, Data Link layer, Network layer, Application layer, Transport layer

c)

Physical layer, Data Link layer, Transport layer, Network layer, Application layer

d)

Physical layer, Data Link layer, Network layer, Transport layer, Application layer

45.

Given this network: 204.15.5.0/27. How many hosts are available for this network?

a)

16

b)

28

c)

32

d)

30

46.

Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?

a)

transport

b)

session

c)

application

d)

presentation

e)

network

47.

Match the following:A. Repeaters (1 physical)B. Bridges ( 2 data link)C. Routers (3 network)1. Data Link Layer (bridges)2. Network Layer (routers)3. Physical Layer (repeaters)

a)

A -> 1, B -> 3, C -> 2

b)

A -> 3, B -> 1, C -> 2

c)

A -> 2, B -> 3, C -> 1

d)

A -> 3, B -> 2, C -> 1

e)

A -> 1, B -> 2, C -> 3

48.

What is encapsulation?

a)

Putting the header on an incoming frame

b)

Putting a header on an incoming segment

c)

Putting a header on an outgoing frame

d)

Putting a header on an outgoing bit

49.

Which layer is most concerned with user applications?

a)

Application

b)

Presentation

c)

Network

d)

Physical

50.

Which of the following is de-encapsulation?

a)

Stripping the header from a frame

b)

Putting a header on a segment

c)

Putting a header on a frame

d)

Stripping a frame from a lin

51.

What layer converts data into segments?

a)

Application

b)

Presentation

c)

Transport

d)

Physical

52.

What layer converts data into Packets?

a)

Network

b)

Application

c)

Physical

d)

Data Link

53.

What layer converts data into Frames?

a)

Application

b)

Physical

c)

Data Link

d)

Transport

54.

What layer converts data into bits?

a)

Application

b)

Session

c)

Data Link

d)

Physical

55.

Which layer is most concerned with getting data from the beginning to the final destination?

a)

Application

b)

Presentation

c)

Session

d)

Transport (reliable) - port

56.

What is the socket address?

a)

Port number

b)

IP address + Port number

c)

IP address

d)

MAC address + Port number

57.

Which of the following protocols uses distance vector routing algorithm?

a)

OSPF 255.255.240.0

b)

RIP

c)

EGP

d)

BGP

58.

When you ping the loopback address, where is a packet sent?

a)

Across the wire

b)

On the network

c)

Through the loopback dongle

d)

Down through the layers of the IP architecture and then up the layers

59.

Which of the following is used to show IP address of a host in Windows operating system?

a)

ipconfigure

b)

ifconfigure

c)

ifconfig

d)

ipconfig

60.

How to establish a TCP connection?

a)

4-way handshake occurs

b)

4-way handshake occurs

c)

3-way handshake occurs

d)

2-way handshake occurs

61.

On Windows Server network operating system, what is often used to implement and administer some network services like web server, email server, FTP server?

a)

MMC (Microsoft Management Console)

b)

IIS (Internet Information Services)

c)

Hyper-V

d)

Active Directory

62.

How many fields are there in a header of IPv4 packet?

a)

16

b)

15

c)

13

d)

10

63.

Which of the following systems provides packet switching service?

a)

postal system

b)

telephone system

64.

What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?

a)

192.168.10

b)

51

c)

192

d)

0.0.0.5

65.

The communication mode that supports two-way traffic but only one direction at a time is...

a)

half duplex

b)

simplex

c)

duplex

d)

multiplex

66.

In TCP/IP model, process-to-process delivery is in...

a)

Data Link layer

b)

Transport layer

c)

Network layer

d)

Physical layer

67.

What can greatly reduce IP address configuration problems?

a)

DHCP Server (dynamic host configuration protocol)

b)

WINS Server

c)

FTP Server

d)

DNS Server

68.

Netmask is used to determine:

a)

An IP address is in the subnet

b)

An IP address is a server

c)

An IP address is a gateway

d)

An IP address is a DNS

69.

Which layer of OSI determines the interface of the system with the user?

a)

Application layer

b)

Network layer

c)

Data Link layer

d)

Session layer

70.

What is default port of HTTP service?

a)

53

b)

22

c)

80

d)

110

71.

In VMware, ___________ configures your virtual machine to connect directly to the physical network.

a)

Custom networking

b)

Bridge

c)

Host-only networking

d)

NAT (network address translation)

72.

Which of the following layer protocols (TCP/IP model) are responsible for user and the application program support such as passwords, resource sharing, file transfer and network management?

a)

Layer 4 protocols

b)

Layer 2 protocols

c)

Layer 5 protocols

d)

Layer 3 protocols

73.

What can be identified by examining the network layer header?

a)

The destination host address

b)

The bits that will be transferred over the media

c)

The source application or process creating the data

d)

The destination device on the local media

74.

Which of the following is used to show IP address of a host in Linux operating system?

a)

ipconfigure

b)

ifconfigure

c)

ipconfig

d)

ifconfig

75.

On which of the following protocols in Transport layer is FTP (File Transfer Protocol) mainly based?

a)

TCP

b)

UDP

76.

How many fields are there in a header of IPv6 packet?

a)

7

b)

5

c)

9

d)

12

77.

What is a correct netmask for a class A network?

a)

255.255.0.0

b)

0.0.0.255

c)

255.255.255.0

d)

255.0.0.0

78.

How many bits are there in an IPv6 network address?Choose one answer.

a)

128

b)

16

c)

32

d)

64

79.

What is a correct netmask for subnet 192.168.100.128/25?

a)

255.255.255.0

b)

255.255.255.128

c)

255.255.255.192

d)

255.255.255.250

80.

Which of the following commands is used to test reachability of a remote host?

a)

ping

b)

tracert 255.255.248.0 show ip route

c)

nmap

d)

nslookup

81.

Which of the following is the address of the router?

a)

The default gateway

b)

The IP address

c)

The IP address

d)

The IP address

82.

Which of the following statements are correct about RIP?

a)

uses a multicast address to update other routers every 90 seconds

b)

will send out an update if there is a failure of a link

c)

uses a broadcast to update all other routers in the network every 60 seconds

d)

updates only contain information about routes that have changed since last update

83.

What is default port of POP3 service?

a)

25

b)

53

c)

80

d)

110

84.

What does VLAN stand for?

a)

Virtual LAN

b)

Variable LAN

c)

Vector LAN

d)

Video LAN

85.

__________ is a security scanner used to discover computers and services on a computer network.

a)

ping

b)

netstat

c)

tracert

d)

nmap

86.

__________ displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics.

a)

nmap

b)

tracert

c)

netstat

d)

DNS

87.

Which address is the loopback address?

a)

255.255.255.255

b)

127.0.0.1

c)

127.0.0.0

d)

0.0.0.1

88.

Which of the following TCP/IP protocol is used for transferring electronic mail messages from one machine to another?

a)

FTP

b)

OSPF

c)

SMTP

d)

SNMP

89.

What is the command to restart Apache2 web server on Ubuntu Linux?

a)

sudo /etc/init.d/apache2 restart

b)

su /etc/init.d/apache2 restart

c)

sudo /etc/init.d/apache2 start

d)

su /etc/init.d/apache2 start

90.

What is a correct netmask for subnet 192.168.100.128/26?

a)

255.255.255.0

b)

255.255.255.192

c)

255.255.255.224

d)

255.255.255.128

91.

What is default port of DNS service?

a)

20

b)

22

c)

53

d)

21

92.

What is the purpose of the TTL field in the IP header?

a)

limits the time or hops that a packet can traverse through the network before it should be discarded

b)

used to mark routes as unreachable in updates sent to other routers

c)

defines a maximum metric value for each distance vector routing protocol by setting a maximum hop count

d)

prevents a router from advertising a network through the interface from which the update came e. prevents regular update messages from reinstating a route that may have gone bad

93.

The purpose of this equipment is to convert analog signals into digital signals and vice versa to be transmitted over a computer network.

a)

Repeater

b)

Hub

c)

Switch

d)

Modem

94.

Proxy servers work on ____________ of the OSI model.

a)

Data Link layer

b)

Application layer

c)

Network layer

d)

Network layer

95.

Which of the following commands is used to download and install DHCP server (dhcp3-server) on Ubuntu Linux?

a)

sudo apt-get install dhcp3-server

b)

sudo /etc/init.d/ dhcp3-server start

c)

sudo app-get install dhcp3-server

d)

sudo get install dhcp3-server

96.

Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

a)

Network Operating System

b)

Virtual Private Network

c)

Network Server

d)

OSI

97.

What is default port of IMAP service?

a)

443

b)

110

c)

80

d)

143

98.

ICMP (Internet Control Message Protocol) is...

a)

a protocol that handles error and control messages

b)

a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address

c)

a protocol used to mona protocol used to monitor computers

d)

a TCP/IP high level protocol for transferring files from one machine to another

99.

Identify the odd term amongst the following group:

a)

Microwaves

b)

Coaxial cable

c)

Twisted pair wire

d)

Optical fiber cable

100.

Non adaptive algorithm is used in...

a)

Link state routing protocols

b)

Dynamic routing protocols

c)

Static routing protocols

d)

Distance vector routing protocols

101.

Which layer encapsulates the segment into packets?

a)

Network layer

b)

Data Link layer

c)

Physical layer

d)

Transport layer

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