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What type of communication is used?
node to node
Services provided by DLL? (4)
1. Framing 2. Flow control 3. Error Control 4. congestion control
What is Framing
encapsulate datagram from network layer into frame before sending to next node. Node decapsulates datagram from frame
What does a frame include?
header + tailer + data
main purpose of flow control?
buffer on receiver. if full stop trasmitting etc
three types of link layer addressing
unicast addressing?
one-to-one communication, each host or interface of a router is assigned a unicast address
ARP?
Address Resolution Protocol - accepts IP address from network layer, maps address to corresponding link-layer address and passes it to DLL
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