Basic CS [TCS Placement]: Sample Questions 24 - 25 of 196

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Question 24

Basic CS
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Describe in Detail

Essay▾

What is point- to-point protocol?

Explanation

  • Point-to-point communications protocol connects computers to remote networking services including Internet service providers- most common type of WAN connection.
  • PPP connections connect LANs to service provider WANs, and connect LAN segments within an organization network.
  • A LAN-to-WAN point-to-point connection is also referred to as a serial connection or leased-line connection because the lines are leased from a carrier (usually a telephone company) and are dedicated for use by the company leasing the lines.
  • PPP can be used over twisted pair, fiber-optic lines, or satellite transmission.
  • PPP provides transport over ATM, Frame Relay, ISDN, and optical links.
Given the Image is Define the Point-To-Point Protocol

Question 25

Basic CS
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Describe in Detail

Essay▾

What are the responsibilities of Presentation Layer?

Explanation

The Presentation layer is concerned with the syntax and semantics of the information exchanged between two systems.

  • Translation
    • Before being transmitted, information in the form of characters and numbers should be changed to bit streams.
    • Presentation layer provides interoperability between encoding methods as different computers use different encoding methods.
    • Translates data between formats of network and the format understood by the computer.
  • Encryption

    Carries out encryption at the transmitter and decryption at the receiver.

  • Compression
    • Does data compression to reduce the bandwidth.
    • Important in transmitting multimedia such as audio, video, text etc.

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