Basic CS-Networks [3i Infotech Placement]: Sample Questions 34 - 35 of 90

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Question 34

Networks
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Describe in Detail

Essay▾

What is SLIP (Serial Line Interface Protocol) ?

Explanation

Define SLIP in Image
  • SLIP is a TCP/IP protocol used for communication between two machines previously configured for communication with each other.
  • Very simple protocol for transmission of IP datagram across a serial line.
  • Allows packets to be sent from one IP address to another.
  • When flag byte occurs inside the IP packet character stuffing is used to solve the problem.
  • Not used as frequently as its successor- Point-to-Point Protocol which provides enhanced error detection and automatic configuration.

Disadvantages of SLIP

  • Does not perform error detection and correction.
  • Supports only IP- not used for other networks
  • Does not provide authentication.
  • Is not an approved internet standard.

Question 35

Networks
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Describe in Detail

Essay▾

What is logical link control?

Explanation

Understanding of Logical Link Control
  • The logical link control layer is one of two sub layers of the Data-Link layer in the Open Systems Interconnection model of communication.
  • Concerned with managing traffic over the physical medium.
  • Located in the upper DLL area of OSI Layer 2 above the Physical Layer of OSI Layer 1.

Primary function of LLC:

  • Multiplexing
    • Splits information into ‘frames’ of data.
    • LLC then sends these frames across the line and arranges them back in order.
  • Flow control:
    • LLC specifies the order in which the frames are sent helping receiver understand the order of receiving.
  • Error control
    • Only detects errors- does not correct them using cyclic redundancy.

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