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Unformatted text preview: Kevin Schoenherr Ch 8&9 1.icmp- as part of the TCP/IP internet layer defines protocol message sed to inform network engineers of how well an internetwork is working. 2.echo request- the icmp message sent by the ping command. 3.echo reply- the icmp message sent by a host when it receives an icmp echo request message. 4.unreachable message- an icmp message sent by hosts and routers when a packet must be discarded for one reason or another. 5.mtu- the largest ip packet size allowed to be sent out a particular interface. 6.fragments- when a router nees to forward a packet and the packet is longer than the MTU of the outgoing interface the router breaks the packet into smaller packets. 7. ttl field- a field in the ip header that prevents a packet from indefinitely looping around an ip internetwork. 8.network unreachable- router could not forward the packet because it did not have a valid route 9. host unreachable- router has a route matching the packets destination address but the host 9....
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This note was uploaded on 06/17/2008 for the course NETW 204 taught by Professor N/a during the Spring '08 term at DeVry Columbus North.
- Spring '08