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Question 133 - 312-38 discussion

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Which of the following fields in the IPv6 header is decremented by 1 for each router that forwards the packet?

A.
Flow label
Answers
A.
Flow label
B.
Next header
Answers
B.
Next header
C.
Traffic class
Answers
C.
Traffic class
D.
Hop limit
Answers
D.
Hop limit
Suggested answer: D

Explanation:

The hop limit field in the IPv6 header is decremented by 1 for each router that forwards a packet. The packet is discarded when the hop limit field reaches zero.

Answer option B is incorrect. Next header is an 8-bit field that specifies the next encapsulated protocol.

Answer option A is incorrect. Flow label is a 20-bit field that is used for specifying special router handling from source to destination for a sequence of packets.

Answer option C is incorrect. Traffic class is an 8-bit field that specifies the Internet traffic priority delivery value.

asked 18/09/2024
pheangphadhu pravitpinyo
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