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ROUTING PROTOCOL IGRP. REVIEW. Purpose of Router determine best path to destination pass the frames to the destination Protocols routed - used by hosts, can be directed or routed routing -used by routers, directs routed data to the destination examples - RIP, IGRP. PATH DETERMINATION.
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REVIEW • Purpose of Router • determine best path to destination • pass the frames to the destination • Protocols • routed - used by hosts, can be directed or routed • routing -used by routers, directs routed data to the destination • examples - RIP, IGRP
PATH DETERMINATION • Determine path for data to be delivered to the destination • strip off data link frame to examine packet • reads destination address of packet • Routing Table • contains routes to various networks • contains metrics for each route • default next hop
CONTINUED • Use metrics to compare routes • hop count • bandwidth • delay • cost • load • ticks • reliability
ADDRESSING • Passing frames to the destination through routers • IP address of source and destination maintained • MAC address of next hop is used to reframe data packet • At destination network router destination host MAC address is used to reframe data packet
REVIEW • What is the difference between routed and routing protocols? • What is a metric? • What MAC address is used when passing data between routers? • What address remains constant through the routing process?