Tag Archives: Layer 2

The Data Link Layer – Layer 2

The Data Link layer performs a number of separate activities, including:

The Data Link Layer Layer 2 246x300 The Data Link Layer – Layer 2

  • Physical addressing
  • Network topoloty
  • Error notification
  • Access to the physical medium
  • Flow control
  • Different data link layer specifications define different network and protocol characteristics, including physical addressing, network topology, error notification, sequencing of frames, and flow control.

    Physical addressing, is not to be confused with network or IP addresing. The physical address defines how devices are labeled in the data link layer. This physical address is most commonly called the Media Access Control (MAC) address. The MAC address is a unique number assigned by the manufacturer. This numbering system is actually administered by one of the networking governing bodies.

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    Tags: data link layer, link layer, What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?