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Q1.

a) describe the reason for the existence of UDP? Would it not have been adequate to just let user processes send raw IP packets? Validate your answer.

b) Illustrate the purpose of the given fields in TCP segment header?

  • Urgent pointer
  • Six 1-bit flags
  • Window size

c) TCP machine is sending windows of 65535 bytes over a 1-Gbps channel which consists of a 10-milisecond one–way delay. Find out the maximum throughput achievable? Illustrate the term line efficiency?

Q2.

a) prepare down the DES algorithm for the data encryption.

b. describe the given monoalphabetic cipher. (Note: the space as it is) “VRGR PBHEFR VF TBBQ”.

c. prepare a brief note on one of the given:

  • Modulation and Encoding
  • Queuing Theory
  • Telnet

 

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M910294

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