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The Data Link Layer
a)Problems
–How to transfer data correctly on a instable link
b)Node:Host and router in the network
c)Link:The channel connects the adjacent nodes
d)The DATA LINK LAYER provides access to the networking
media and physical transmission across the media, which
enables the data to locate its intended destination.
e)Layer 2 protocols definethe format of dataexchanged on a link,
and definethe actionof the two nodes on the link
The DATA LINK LAYER handleserror notification,network
topology, andflow control.
f)
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