Data-Link Layer Standards

  • The Entire family of IEEE LAN Standards Standards that together define the Physical Layer & the Data-Link Layers of the Wired LAN technology is referred to as an Ethernet.

  • Because Physical Layer focuses on sending bits over different types of Physical cables with different types of Length, Medium, etc. Hence there are various types of Physical Layer Standards.

  • But Data-Link Layer focuses on sending an Ethernet Frame (Header+Data+Trailer) from the Source Ethernet Node to the Destination Ethernet Node. Hence it uses the same Data-Link Layer Standard over all these different Physical links (within that Ethernet LAN).

  • So a LAN may be using Copper+Fiber with different speeds on each link still it will be using one same Data-Link Layer Standard over the entire LAN.

Reference:

CCNA 200-301 OCG, Volume 1, Pg. 38 - Wendell Odom .

PreviousPhysical Layer StandardsNextTransmitting Data over Ethernet UTP

Last updated