GATE | GATE CS Mock 2018 | Set 2 | Question 20

Which of the following option is false regarding option field in the IPv4 header:

(A) The Value of “Type” in the Security option field of an IPv4 header is 131.
(B) 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.
(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: (A)
Explanation: Only option (A) is false, since the Value of “Type” in the Security option field of an IPv4 header is 130.
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