Cisco Exam 400-101 Topic 19 Question 5 Discussion

Actual exam question for Cisco's 400-101 exam

Question #: 5
Topic #: 19

Which statement describes the operation of the Generalized TTL Security Mechanism (GTSM). used by routing protocols to prevent some types of attack?

AThe TTL in a received packet must be a high value (typically 254 - 255)

BAn MD5 hash of the received TTL, source IP, destination IP, protocol , and shared key must match

CThe TTL in a received packet must be a low value (typically 1 - 2)

DBoth end systems compute an MD5 hash based on the TTL and a shared secret. If the received and local value differ, the packet is dropped

Show Suggested Answer

Suggested Answer: A

by Trinidad at Jul 23, 2022, 07:38 PM

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