Consider the following statements regarding Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6):

• (I) IPv6 is faster than IPv4.
• (II) IPv6 is connection less while IPv4 is connection oriented.
• (III) IPv6 header size is fixed, while IPv4 header size is variable.

Which of the following statement(s) is/are correct?
(A) I and II
(B) I and III
(C) II and III
(D) All I, II , III


Answer: (B)

Explanation:

• Statement (I) is correct. Accessing sites and content over the Internet is usually faster with IPv6 than with IPv4 because with the new protocol it requires fewer \”hops\” between network nodes.
• Statement (II) is false. IPv4 is always connection-less and IPv6 normally provides a connection-less service, but it can provide a connection-oriented service if flow label field is used.
• Statement (III) is correct. IPv6 header size is fixed (i.e., 40 byte), while IPv4 header size is variable (i.e., from 20 bytes to 60 bytes).

So, option (B) is correct.

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