Header of datagram in IPv4 has _________

A. 0 to 20 bytes
B. 20 to 40 bytes

C. 20 to 60 bytes

D. 20 to 80 bytes

Explanation: IP header length is a minimum of 20 bytes and a maximum of 60 bytes. The minimum value for this field is 5, which is a length of 5×32 = 160 bits = 20 bytes. Being a 4-bit value, the maximum length is 15 words (15×32 bits) or 480 bits = 60 bytes.

Occurrence: 0, System Administrator 2026