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Data link layer

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by maggiebo

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Explain the functions of the Data link layer and the sublayers within this layer and where exactly does the MAC address fit in?

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by minnesotadude

The data link layer is essentially comprised of the Logical Link Control (LLC) and Media Access Control (MAC) sub layers. The MAC sublayer concerns itself with the MAC or hardware addresses of the devices working on the network. This is used by the TCP/IP process to identify the proper node to send packets to. Manufacturers will assign these addresses to the NIC cards they produce. The LLC was defined by the IEEE as a way of establishing connection oriented or connectionless data communication between nodes.

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