When a tracert command is issued, a ping is being sent to each hop along the route. Answer B is correct because if a router is configured not to respond to ping attempts, Request timed out will be displayed and none of the routers which should receive the packets after that one will get them. Answer A is correct because when a router is down it is possible that a Request timed out can be the response listed. They will only process updates with the correct AS number.Ĭorrect answers and explanations: A and B. This helps cut down on the amount of updates being processed by each router. For EIGRP updates to be processed, two systems must share the same AS number. ASesĮIGRP uses AS numbers to determine which updates will be processed by each router. After 16 attempts, if there is no response back, the neighbor will be considered dead and removed from the router's list of neighbors. If a reply is not sent back from one of its neighbors, then EIGRP will start using unicasts to talk to the neighbor. EIGRP will keep a list of neighbors who have replied to the message. When communicating with neighbors, EIGRP will first send out information to its neighbors using the multicast address of 224.0.0.10. RTPĮIGRP uses Reliable Transport Protocol (RTP) to communicate with neighbors. But, after this initial synchronization, only updates will be transmitted between neighbors, not the entire routing table. Once this association is formed, the router and its neighbors will advertise their entire routing tables to each other. It will then try to form an association with them. When a router using EIGRP comes online, the first thing it will do is try to find all its neighbors. Not only can EIGRP store up to six equal paths but it can store up to six unequal paths.
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