Computing Dictionary
data link layer definition
networking Layer two, the second lowest layer in the
OSI seven layer model. The data link layer splits data into
frames (see
fragmentation) for sending on the
physical layer and receives acknowledgement frames. It performs error checking and re-transmits frames not received correctly. It provides an error-free virtual channel to the
network layer. The data link layer is split into an upper sublayer,
Logical Link Control (LLC), and a lower sublayer,
Media Access Control (MAC).
Example
protocols at this layer are
ABP,
Go Back N,
SRP.
(1995-02-14)
