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:
“This world is run by people who know how to do things. They know how things work. They are equipped. Up there, theres a layer of people who run everything. But wewere just peasants. We dont understand whats going on, and we cant do anything.”
—Doris Lessing (b. 1919)
“Mental health data from the 1950s on middle-aged women showed them to be a particularly distressed group, vulnerable to depression and feelings of uselessness. This isnt surprising. If society tells you that your main role is to be attractive to men and you are getting crows feet, and to be a mother to children and yours are leaving home, no wonder you are distressed.”
—Grace Baruch (20th century)
“We fight our way through the massed and leveled collective safe taste of the Top 40, just looking for a little something we can call our own. But when we find it and jam the radio to hear it again it isnt just oursit is a link to thousands of others who are sharing it with us. As a matter of a single song this might mean very little; as culture, as a way of life, you cant beat it.”
—Greil Marcus (b. 1945)