UGC NET CSE | November 2017 | Part 3 | Question: 30

Question

Which of the following statements are true?

1. The fragmentation fields in the base header section of $\text{IPv4}$ have moved to the fragmentation extension header in $\text{IPv6}$.
2. The authentication extension header is new in $\text{IPv6}$.
3. The record route option is not implemented in $\text{IPv6}$.

• A. (i) and (ii) Only
• B. (ii) and (iii) Only
• C. (i) and (iii) Only
• D. (i), (ii) and (iii)

Answer 1

The fragmentation fields in the base header section of IPv4 have moved to the fragmentation extension header in IPv6:

So, given statement is correct.

Authentication header (protocol 51) is identical in both IPv4 and IPv6, but authentication extension header is new in IPv6. So, given statement is correct.

In the IPv6 specifications [IPv6], no record route function is defined, and the record route function for IPv4 is less flexible and has scalability problems. So, given statement is correct.

Hence, option (D) is correct.

Answer 2

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Only (a) and (b) are true

Fragmentation, Authentication, and Record Route(Loose Source Routing) are all Present in IPv6 in Next Header(Extension Headers)