A security administrator is troubleshooting a network connectivity issue. The administrator believes that a router’s ACL may be blocking network traffic to a remote
network. Which of the following, if enabled, would confirm the administrator’s theory by providing helpful feedback?

A.
DNS
B.
NAT
C.
NetBIOS
D.
ICMP
simple ping to ip
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ICMP (Internet Control Message Protocol) is an error-reporting protocol network devices like routers use to generate error messages to the source IP address when network problems prevent delivery of IP packets.
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