Question

An IP packet arrives at a router with the first eight bits as 01001000. How many bytes are there in the OPTIONS field?

Answer 1

Answer:

Well,

Explanation:

In this I.P packet 72 bytes are there.

But there is no option given.

Answer 2

There will be 12 bytes of options filed available.

The number 4 in the first four bits (nibble) indicates that the packet is an IPv4 packet.

The next nibble, with the value 8, indicates that the header contains eight 32-bit words or 32 bytes. The basic header is 20 bytes long, leaving 12 bytes for option data.