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Wireless Mobile Communications
Network Protocols
Q
Header of datagram in IPv4 has _________
AA. 0 to 20 bytes
BB. 20 to 40 bytes
CC. 20 to 60 bytes
DD. 20 to 80 bytes
Correct Answer:
C. C. 20 to 60 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.
