Layer 2: Data Link Layer
The data link layer packages raw bits from the physical layer into frames (logical, structured packets for data). It is specified in ITU-T Rec. X.212, ITU-T Rec. X.222 and others. This layer is responsible for transferring frames from one host to another. It might perform error checking.
Read more about this topic: OSI Protocols
Famous quotes containing the words layer, data and/or link:
“The writer in me can look as far as an African-American woman and stop. Often that writer looks through the African-American woman. Race is a layer of being, but not a culmination.”
—Thylias Moss, African American poet. As quoted in the Wall Street Journal (May 12, 1994)
“This city is neither a jungle nor the moon.... In long shot: a cosmic smudge, a conglomerate of bleeding energies. Close up, it is a fairly legible printed circuit, a transistorized labyrinth of beastly tracks, a data bank for asthmatic voice-prints.”
—Susan Sontag (b. 1933)
“Elephants walking
Along the trails
Are holding hands
By holding tails.”
—Lenore M. Link (fl. 1937)