Summary
We have seen that the landscape of networking standards is littered with a figurative alphabet soup of standards bodies and their output. The Data Link layer is only one of the seven layers of the OSI-RM, an abstract model of a layered protocol stack. The TCP/IP protocol suite is much less formal than the OSI-RM, but layers similar functions in hierarchically similar ways.
The IEEE has developed numerous standards at the Data Link layer, and in doing so has created the logical partition of the Data Link layer into the Logical Link Control (LLC) and Medium Access Control (MAC) sub-layers.
Wireless LANs, which operate at the Data Link layer, are being standardized by the IEEE 802.11 working group, which has produced a fairly complex set ...
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