What is the maximum number of IP addresses that can be stored using the Record Route option?

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Multiple Choice

What is the maximum number of IP addresses that can be stored using the Record Route option?

Explanation:
Record Route stores a list of router addresses in the IPv4 options field, and that field is limited to 40 bytes in total. The option header itself uses 3 bytes (type, length, pointer), and each stored address takes 4 bytes. So you can fit floor((40 − 3) / 4) = floor(37 / 4) = 9 addresses. That means up to nine entries can be recorded, which some questions refer to as time stamps. The others listed would require more space than the 40-byte limit allows.

Record Route stores a list of router addresses in the IPv4 options field, and that field is limited to 40 bytes in total. The option header itself uses 3 bytes (type, length, pointer), and each stored address takes 4 bytes. So you can fit floor((40 − 3) / 4) = floor(37 / 4) = 9 addresses. That means up to nine entries can be recorded, which some questions refer to as time stamps. The others listed would require more space than the 40-byte limit allows.

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