Nokia 4A0-100 Exam - Topic 1 Question 126 Discussion

Actual exam question for Nokia's 4A0-100 exam

Question #: 126
Topic #: 1

[All 4A0-100 Questions]

Which of the following statements about ICMP functions is FALSE?

AUsed to test end-to-end connectivity.

BCan be used to identify the hops that traffic must pass through to get to the destination.

CUtilizes different return codes for error reporting.

DProvides an automatic re-route if destination is unreachable.

Show Suggested Answer

Suggested Answer: D

ICMP (Internet Control Message Protocol) is used for network diagnostics and error messaging. Key uses include:

Ping (Echo Request/Reply) -- tests end-to-end connectivity

Traceroute -- uses ICMP time exceeded messages to identify hops

Error reporting -- returns various error types with different codes

However, ICMP does not re-route traffic. If a destination is unreachable, ICMP reports the error back to the sender; it doesn't instruct routers to re-route.

Option D is FALSE -- ICMP does not perform routing.

Nokia IP Fundamentals Guide -- Section: ''ICMP and Network Diagnostics''

RFC 792 -- ICMP Standard

by Jamal at May 12, 2026, 10:18 PM

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Micaela

2 days ago

I remember studying ICMP, and I think it’s mainly for error reporting and diagnostics, but I’m not sure about the automatic re-route part.

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