GATE | Sudo GATE 2020 Mock II (10 January 2019) | Question 12

Which of the following option is false regarding option field in the IPv4 header:
(A) If the header length is greater than 5 (i.e., it is from 6 to 15) it means that the options field is present and must be considered.
(B) The Value of “Type” in the Security option field of an IPv4 header is 131.
(C) Copied, Option Class, and Option Number are sometimes referred to as a single eight-bit field, the Option Type.
(D) None of these


Answer: (B)

Explanation: Only option (B) is false, since the Value of “Type” in the Security option field of an IPv4 header is 130.

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