1. ROUTING PROTOCOL IGRP

2. REVIEW 4 Purpose of Router –determine best path to destination –pass the frames to the destination 4 Protocols –routed - used by hosts, can be directed or routed –routing -used by routers, directs routed data to the destination –examples - RIP, IGRP

3. PATH DETERMINATION 4 Determine path for data to be delivered to the destination –strip off data link frame to examine packet –reads destination address of packet 4 Routing Table –contains routes to various networks –contains metrics for each route –default next hop

4. CONTINUED 4 Use metrics to compare routes –hop count –bandwidth –delay –cost –load –ticks –reliability

5. ADDRESSING 4 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

6. REVIEW 4 What is the difference between routed and routing protocols? 4 What is a metric? 4 What MAC address is used when passing data between routers? 4 What address remains constant through the routing process?