In networking and communications, the formats, codes and procedures for transmitting a unit of data (frame, packet) from one node to another. Known as a "layer 2 protocol," the data link protocol ...

The technical name of a frame of data transmitted over the data link layer (layer 2) in a communications network. Ethernet and Token Ring are examples of this layer. Many people neither use the ...

Tunneling is useful for carrying nonroutable legacy protocols, or IP packets with private addresses. Classical data link practice assumes the following: Media topology is broadcast or point-to-point.