Question

The size of the option field of an ip datagram is 20 bytes. What is the value of hlen in binary?

Answer 1

Answer:

The HLEN value is 5, which means the total number of bytes in the header is 5 × 4 or 20 bytes (no options). The total length is 40 bytes, which means the packet is carrying 20 bytes of data (40−20).