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
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.