Tuesday, February 21, 2023

Explain the purpose of Data Link Layer and also draw the diagram for the same.

The Data Link layer is responsible for 

  • Communications between end-device network interface cards.
  • It allows upper layer protocols to access the physical layer media and encapsulates Layer 3 packets (IPv4 and IPv6) into Layer 2 Frames.
  • It also performs error detection and rejects corrupts frames.

The Data Link Layer consists of two sublayers. 

  1. Logical Link Control (LLC) and 
  2. Media Access Control (MAC).

The LLC sublayer communicates between the networking software at the upper layers and the device hardware at the lower layers.

The MAC sublayer is responsible for data encapsulation and media access control.



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Explain the purpose of Data Link Layer and also draw the diagram for the same.

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