GIAC
GCIH · Question #393
To defend against network mapping, which of the following packets should be denied at the border router?
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Reconnaissance, Scanning, and Enumeration
Question
To defend against network mapping, which of the following packets should be denied at the border router?
Options
- AOutgoing ICMP Port Unreachable messages
- BOutgoing ICMP Echo Request messages
- CIncoming ICMP Time Exceeded messages
- DIncoming ICMP Echo Request messages
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Topics
#ICMP filtering#network mapping defense#border router#port unreachable