26.IPv4 헤더 포맷을 구성하는 필드가 아닌 것은?

해설

IPv4 헤더 구성 0 4 8 16 24 31 --------+-------+----------------+--------+---------+ Version Header Type of Service Total Length Length ---------------------------------+--------+---------- Identification Flags Fragment Offset ---------------+-----------------+------------------- Time to Live Protocol type Header Checksum ----------------------------------------------------- Source Address ----------------------------------------------------- Destination Address ----------------------------------------------------- Option ----------------------------------------------------- Data -----------------------------------------------------