Refer to the output of the corporate router routing table shown in the graphic.
The corporate router receives an IP packet with a source IP address of 192.168.214.20 and a
destination address of 192.168.22.3.
What will the router do with this packet?
A.
It will encapsulate the packet as Frame Relay and forward it out interface Serial 0/0.117.
B.
It will discard the packet and send an ICMP Destination Unreachable message out interface
FastEthernet 0/0.
C.
It will forward the packet out interface Serial 0/1 and send an ICMP Echo Reply message out
interface serial 0/0.102.
D.
It will change the IP packet to an ARP frame and forward it out FastEthernet 0/0.
Since the routing table shows no route to the 192.168.22.0 network, the router will discard the packet and send an ICMP destination unreachable message out interface FastEthernet 0/0, which is the source LAN where the packet originated from.
The Internet Control Message Protocol (ICMP) is one of the main protocols of the internet protocol suite. It is used by network devices, like routers, to send error messages indicating, for example, that a requested service is not available or that a host or router could not be reached.
The Internet Control Message Protocol is used by routers, devices or hosts to communicate error information to other routers, devices, or hosts. An ICMP message contains TYPE, CODE and CHECKSUM fields. These fields identify the ICMP message, provide additional information about Type and provide a method for determining the integrity of the message.
The PING command, for example, uses ICMP to test an Internet connection.