Computer Networking
The Internet Control Message Protocol (ICMP)

allows gateways to send error a control messages to other gateways or hosts
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
None of these
All of these
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem

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Computer Networking
If you wanted to deny all Telnet connections to only network 192.168.10.0, which command could you use?

access-list 100 deny tcp 192.168.10.0 0.255.255.255 eq telnet
access-list 100 deny tcp any 192.168.10.0 0.0.0.255 eq 23
access-list 100 deny tcp 192.168.10.0 255.255.255.0 eq telnet
access-list 100 deny 192.168.10.0 0.0.0.255 any eq 23

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