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Nokia 4A0-100 Exam - Topic 3 Question 128 Discussion

Which of the following statements about ICMP functions is FALSE?
D) Provides an automatic re-route if destination is unreachable.
A) Used to test end-to-end connectivity.
B) Can be used to identify the hops that traffic must pass through to get to the destination.
C) Utilizes different return codes for error reporting.

Nokia 4A0-100 Exam - Topic 3 Question 128 Discussion

Actual exam question for Nokia's 4A0-100 exam
Question #: 128
Topic #: 3
[All 4A0-100 Questions]

Which of the following statements about ICMP functions is FALSE?

Show Suggested Answer Hide 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 Lilli at Jun 22, 2026, 07:19 PM

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Rusty
13 days ago
Right! A, B, and C are true. D is misleading.
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Whitney
18 days ago
Agreed! ICMP just reports errors, no rerouting.
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Clarence
23 days ago
I think D is the false one. ICMP doesn't reroute traffic.
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Brent
28 days ago
C is interesting, but I always thought ICMP was just for pings.
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Nieves
1 month ago
A and B are true, but D is misleading.
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Deja
1 month ago
Wait, are you sure about D? I thought it could help with that.
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Paulina
1 month ago
Agreed, ICMP is just for error messages, not rerouting.
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Carlene
2 months ago
D is definitely false. ICMP doesn't reroute.
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Leota
2 months ago
I’m a bit confused about B; I know ICMP can trace routes, but I’m not sure if it’s the only way to do that.
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Tyra
2 months ago
I think I saw a similar question about ICMP return codes, so C should be correct.
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Thaddeus
2 months ago
I’m not entirely sure, but I feel like D sounds off since ICMP doesn’t really reroute traffic automatically.
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Giovanna
2 months ago
I remember studying ICMP and its role in connectivity tests, so I think A is true.
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