A cyberanalyst is reviewing an entry-point ACL. What three types of ICMP traffic should be allowed to access an internal network from the internet? (Choose three.)
- destination unreachable
- time exceeded
Explanation: ACLs should only permit special types of ICMP messages to enter an internal network. Allowed ICMP traffic includes an ICMP reply, source quench, and any ICMP unreachable messages. All other ICMP traffic types should be denied.
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