Computer Network Exam

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

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

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

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4
8
16
32

Which of the following layer is not network support layer?

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Transport Layer
Network Layers
Data link Layer
Physical Layer

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

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TCP
IP
UDP
All of the 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

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 address size of IPv6 ?

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32 bit
64 bit
128 bit
256 bit

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

What is the maximum header size of an IP packet?

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

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

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

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 use of Bridge in Network?

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To connect LANs
To separate LANs
To control Network Speed
All of the Above

Which of the following is correct regarding Class B Address of IP address

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Network bit – 14, Host bit – 16
Network bit – 16, Host bit – 14
Network bit – 18, Host bit – 16
Network bit – 12, Host bit – 14

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

A set of rules that govern all aspects of information communication is called

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Server
Internet
Protocol
OSI Model

Router operates in which layer of OSI Reference Model?

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Layer 1 (Physical Layer)
Layer 3 (Network Layer)
Layer 4 (Transport Layer)
Layer 7 (Application Layer)

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 is the size of MAC Address?

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

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

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

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

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

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

The processes on each machine that communicate at a given layer are called

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UDP process
Intranet process
Server technology
Peer-peer process

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 size of Source and Destination IP address in IP header?

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4 bits
8 bits
16 bits
32 bits

The management of data flow between computers or devices or between nodes in a network is called

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Flow control
Data control
Data Management
Flow Management

Bridge works in which layer of the OSI model?

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Appliation layer
Transport layer
Network layer
Datalink 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 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

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

How many layers does OSI Reference Model has?

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4
5
6
7

What is the typical range of Ephemeral ports?

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

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

The IETF standards documents are called

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RFC
RCF
ID
None of the mentioned

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

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)

Computer Network Exam : Question 1 of 40