Computer Network Exam

What is a Firewall in Computer Network?

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The physical boundary of Network
An operating System of Computer Network
A system designed to prevent unauthorized access
A web browsing Software

What is the use of Ping command?

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To test a device on the network is reachable
To test a hard disk fault
To test a bug in a Application
To test a Pinter Quality

How many layers does OSI Reference Model has?

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4
5
6
7

Each IP packet must contain

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Only Source address
Only Destination address
Source and Destination address
Source or Destination address

What is the meaning of Bandwidth in Network?

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Transmission capacity of a communication channels
Connected Computers in the Network
Class of IP used in Network
None of above

What is the minimum header size of an IP packet?

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16 bytes
10 bytes
20 bytes
32 bytes

What is the typical range of Ephemeral ports?

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1 to 80
1 to 1024
80 to 8080
1024 to 65535

Which data communication method is used to transmit the data over a serial communication link?

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Simplex
Half-duplex
Full duplex
All of above

Protocols are?

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Agreements on how communication components and DTE's are to communicate
Logical communication channels for transferring data
Physical communication channels sued for transferring data
None of above

Which of the following layer is not network support layer?

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Transport Layer
Network Layers
Data link Layer
Physical Layer

What is the size of Host bits in Class B of IP address?

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4
8
16
32

Repeater operates in which layer of the OSI model?

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Physical layer
Data link layer
Network layer
Transport layer

What is the full form of RAID ?

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Redundant Array of Independent Disks
Redundant Array of Important Disks
Random Access of Independent Disks
Random Access of Important Disks

What is the size of MAC Address?

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16-bits
32-bits
48-bits
64-bits

Which of the following is not the Networking Devices?

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Gateways
Linux
Routers
Firewalls

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

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Typically used to indicate end of message
Typically used to indicate beginning of message
Typically used to push the message
Typically used to indicate stop the message

Which of the following is not the possible ways of data exchange?

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Simplex
Multiplex
Half-duplex
Full-duplex

Why IP Protocol is considered as unreliable?

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A packet may be lost
Packets may arrive out of order
Duplicate packets may be generated
All of the Above

Which of the following is correct in VLSM?

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Can have subnets of different sizes
Subnets must be in same size
No required of subnet
All of Above

Network congestion occurs

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In case of traffic overloading
When a system terminates
When connection between two nodes terminates
None of the mentioned

Which of the following is correct in CIDR?

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Class A includes Class B network
There are only two networks
There are high & low class network
There is no concept of class A, B, C networks

Which of the following is not the External Security Threats?

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Front-door Threats
Back-door Threats
Underground Threats
Denial of Service (DoS)

What do you mean by broadcasting in Networking?

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It means addressing a packet to all machine
It means addressing a packet to some machine
It means addressing a packet to a particular machine
It means addressing a packet to except a particular machine

Two devices are in network if

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A process in one device is able to exchange information with a process in another device
A process is running on both devices
PIDs of the processes running of different devices are same
None of the mentioned

ADSL is the abbreviation of

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Asymmetric Dual Subscriber Line
Asymmetric Digital System Line
Asymmetric Dual System Line
Asymmetric Digital Subscriber Line

What does Router do in a network?

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Forwards a packet to all outgoing links
Forwards a packet to the next free outgoing link
Determines on which outing link a packet is to be forwarded
Forwards a packet to all outgoing links except the originated link

............provides a connection-oriented reliable service for sending messages

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TCP
IP
UDP
All of the Above

The meaning of Straight-through Cable is

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Four wire pairs connect to the same pin on each end
The cable Which Directly connects Computer to Computer
Four wire pairs not twisted with each other
The cable which is not twisted

DHCP is the abbreviation of

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Dynamic Host Control Protocol
Dynamic Host Configuration Protocol
Dynamic Hyper Control Protocol
Dynamic Hyper Configuration Protocol

The IETF standards documents are called

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RFC
RCF
ID
None of the mentioned

What is the size of Network bits & Host bits of Class A of IP address?

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Network bits 7, Host bits 24
Network bits 8, Host bits 24
Network bits 7, Host bits 23
Network bits 8, Host bits 23

What is the benefit of the Networking?

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File Sharing
Easier access to Resources
Easier Backups
All of the Above

Which of the following layer of OSI model also called end-to-end layer?

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Presentation layer
Network layer
Session layer
Transport layer

What is the address size of IPv6 ?

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32 bit
64 bit
128 bit
256 bit

Controlling access to a network by analyzing the incoming and outgoing packets is called

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IP Filtering
Data Filtering
Packet Filtering
Firewell Filtering

What does the port number in a TCP connection specify?

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It specifies the communication process on the two end systems
It specifies the quality of the data & connection
It specify the size of data
All of the above

Computer Network is

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Collection of hardware components and computers
Interconnected by communication channels
Sharing of resources and information
All of the Above

Bridge works in which layer of the OSI model?

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Appliation layer
Transport layer
Network layer
Datalink layer

What is the IP Address range of APIPA?

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169.254.0.1 to 169.254.0.254
169.254.0.1 to 169.254.0.255
169.254.0.1 to 169.254.255.254
169.254.0.1 to 169.254.255.255

What is the maximum header size of an IP packet?

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16-bits
32-bits
48-bits
64-bits

Computer Network Exam : Question 1 of 40