CS610 Quiz No.1 Shared by Maria

Which of the following statement is wrong regarding ATM? 

It is a single technology for voice, video and data

 It has low jitter and high capacity.

 It uses fixed size, small cells, 48 octet’s data

None of the above= Answer

Ref: Pg.65

 It was designed as a single technology for voice, video and data and has low jitter(variance in delivery time) and high capacity. It uses fixed size, small cells, 48 octet’s data and 5 octets header. It can also connect multiple ATM switches into a network

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There are three standard implementations to improve computational efficiency: Hashing, Direct Indexing and InDirect Indexing

 True

False = Answer

Ref: Pg.94

There are two standard implementations to improve computational efficiency:

• Hashing

• Direct indexing

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___________ places the boundary between the third and fourth octets

Select correct option: 

 Class A

 Class B

 Class C= Answer

  Class D

Ref : http://tagtag.com/chapter14/classes_of_ip_adresses

The primary classes use octet boundaries to partition an address into prefix and suffix. Class A places the boundary between the first and second octets. Class B places the boundary between the second and third octets, and class C places the boundary between the third and fourth octets

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As the Internet grew, the original Classful addressing scheme became a limitation. The IP address space was being exhausted because all networks had to choose one of ________ possible sizes. 

three

 two

 four

 five

Ref: Pg.90

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There are two standard implementations to improve computational efficiency: Hashing and Direct indexing 

True

 False

Ref: Pg.94

There are two standard implementations to improve computational efficiency:

• Hashing

• Direct indexing

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Which of the following is a benefit of source independence? 

It allows fast and efficient routing= Answer

 Packet switch do not need to have complete information about all destinations

 Network functions even if topology changes

 All of the above

Ref: Pg.58

Next hop to destination does not depend on source of packet. This phenomenon is called ‘Source Independence’. It has several benefits. It allows fast and efficient routing

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VBR stands for……………. 

Virtual Bit Rate

 Virtual Byte Rate

 Variable Byte Redundancy

 Variable Bit Rate= Answer

Ref: Pg.71

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Which of the following statement is true regarding Link-state routing? 

Network topology is separated from route computation.

Each switch builds its own routing tables.

Link-state routing uses Djikstra’s algorithm.

All of the above = Answer

Ref: Pg.64

In link-state routing network topology is separated from route computation.Switches send link-state information about local connections. Each switch builds own routing tables. It uses link-state information to update global topology and runs Djikstra’s algorithm.

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Which of the following is called virtual channel? 

Connection in VCI

Connection in ATM= Answer

Connection in virtual circuit

None of the above

Ref: Pg67

Connections in ATM are called virtual channels (VC) or virtual circuits

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 ATM is also called

Labels and Label Switching= Answer

Ref: Pg.68

ATM is thus called a label rewriting or label switching system

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If a link or a packet switch fails then which one of the following would possibly be happened? 

 Link would be reestablished

  Request to change failed hardware would appear     

 The packet switch will modify the tables= Answer

  None of the above

Ref: Pg.63

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If a link or a packet switch fails then the network adapts its failure. The packet switch then modifies the tables to avoid failed hardware.

Asynchronous Transfer Mode uses small fixed size cell. Each cell consist of ----------- octets.

 55

 53 = Answer

 52

 51

Ref: Pg.66

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ATM uses small, fixed sized packets called cells. Each cell has 53 octets.

ABR stands for……………. 

 Asynchronous Bit Rate

  Asynchronous Byte Recovery

 Asynchronous Bit Redundancy

 Available Bit Rate = Answer

 Ref: Pg.71

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The term signaling is used to describ___________

 Communication about the internet

 Communication about the extranet

 Communication about the network = Answer

 None of above

Ref: Pg.70

The term signaling is used to describe communication about the network