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Cisco 13

QuestionAnswer
ICMP (Internet Control Message Protocol) sends TCP/IP error messages
Destination Unreachable codes for ICMPv4 0 = Net unreachable, 1 = Host unreachable, 2 = Protocol unreachable, 3 = Port unreachable
Destination Unreachable codes for ICMPv6 0 = No route to destination, 1 = Communication within the destination is administratively prohibited, 2 = Beyond scope of the source address, 4 = Port unreachable
What does ICMPv6 use in place of the IPv4 TTL field? IPv6 Hop Limit field
List of messages common to ICMPv4 and ICMPv6 Host reachability, Destination or Service Unreachable, Time exceeded
ICMP Echo Message test the reachability of a host on an IP network
what does messaging between IPv6 routers and IPv6 devices use? RS (Router Solicitation) message and RA (Router Advertisement) message
RS (Router Solicitation) determines how to receive a routers IPv6 address info dynamically
RA (Router Advertisement) sent by IPv6-enabled routers every 200 secs to give addressing info to IPv6-enabled hosts
what does messaging between IPv6 devices use? NS (Neighbor Solicitation) message and NA (Neighbor Advertisement) message
NS (Neighbor Solicitation) what a device sends to check the uniqueness of an address along with its own IPv6 address as the target address
NA (Neighbor Advertisement) notifies the sending device that an address is in use
types of connectivity tests preformed with ping pinging the local loopback, pinging the default gateway, pinging the remote host
how do you use ping to test the internal config ? ping the local loopback address of 127.0.0.1 for IPv4 (::1 for IPv6)
tracert (traceroute) generates a list of hops that successfully reached along the path
what does tracert use? uses a function of the TTL field in IPv4 and the Hop Limit field in IPv6 in the Layer 3 headers, and the ICMP Time Exceeded message
RTT (Round Trip Time) the time a packet takes to reach the remote host and for the response from the host to return
when using RTT, what does a * indicate? a lost or unreplied packet
Created by: starrr
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