The Bottom Layers In Ethernet and Wi-Fi networks, the data link layer is split into two sublayers. The Logical Link Control (LLC) is an interface to the Media Access Control (MAC) layer.

The layer-four protocols, TCP and UDP, have different ways for dealing with errors in packets. At the destination, TCP does a calculation that is based on the TCP header, the payload data, and ...

The data link layer is where the optionally scrambled octets are encoded to 8b/10b characters and is also the layer where control character generation or detection is done for lane alignment ...