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Exam 312-38 All Questions

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Exam 312-38 topic 1 question 108 discussion

Actual exam question from ECCouncil's 312-38
Question #: 108
Topic #: 1
[All 312-38 Questions]

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

  • A. Flow label
  • B. Next header
  • C. Traffic class
  • D. Hop limit
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Suggested Answer: D 🗳️
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.

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ethacker
5 months, 2 weeks ago
Selected Answer: D
I can't really find in CND Book a page where literally says that Hop-Limit decerase by 1 at each router jump, but says that replaces IPv4 TTL, and in P.2559 says: Time to live (TTL): This field defines the lifetime of the IP datagram in the Internet system. The TTL field is initially set to a number and decremented by every router. When the TTL reaches zero, it discards the datagram (packet). So i think that ensure option D
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