Basic CS-Networks [3i Infotech Placement]: Sample Questions 37 - 39 of 90

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Question 37

Networks
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Write in Short

Short Answer▾

What is region?

Explanation

  • In hierarchical routing, the router divides network to regions- each router knows details on routing packets to destinations within its own region but nothing about the internal structure of other regions.
  • For example, the network of different departments can be different regions. Across regions the packets are delivered to the correct router which acts proxy to the region.

Question 38

Networks
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Write in Short

Short Answer▾

What is Brouter?

Explanation

Understanding of Brouter
  • A network device that works as a bridge and a router.
  • The brouter routes packets for known protocols and simply forwards all other packets as a bridge.
  • Bridge connects one local area network to another local area network using the same protocol.
  • Term describes a bridge combined with router device- brouters are rarely used.
  • Functionality is often implemented using the router՚s software interface.

Question 39

Networks
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Describe in Detail

Essay▾

In the transport layer, TCP is what type of protocol

Explanation

TCP is a reliable protocol while UDP is not.

Given TCP/UDP Header in Transport Layer

Two main transport layer protocols are used on the Internet:

TCP:

  • Transport layer establishes communication session between two applications- receives data from the application, breaks it into segments, and sends them over network
  • It is a reliable protocol that provides extensive error and flow control to ensure the successful delivery of data.

UDP:

  • User datagram protocol removes all the error-checking from TCP.
  • Packets are just sent to the recipient.
  • Error correction and flow control is responsibility of the application layer.

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