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)
“To write it, it took three months; to conceive it three minutes; to collect the data in it—all my life.”
—F. Scott Fitzgerald (1896–1940)
“I know that there are many persons to whom it seems derogatory to link a body of philosophic ideas to the social life and culture of their epoch. They seem to accept a dogma of immaculate conception of philosophical systems.”
—John Dewey (1859–1952)