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 bytesI got this question in homework.My query is from Network Protocols topic in portion Network Protocol of Wireless/Mobile

Header of datagram in IPv4 has _________(a) 0 to 20 bytes(b) 20 to 40

1.	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 bytesI got this question in homework.My query is from Network Protocols topic in portion Network Protocol of Wireless/Mobile
Answer» Right option is (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.

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