A.TOS B.TTL C.總長度 D.版本號(hào)
A.當(dāng)該字段為0時(shí),數(shù)據(jù)包丟棄 B.當(dāng)該字段為2時(shí),數(shù)據(jù)包丟棄 C.經(jīng)過一個(gè)路由器TTL值就會(huì)減1 D.經(jīng)過一個(gè)路由器TTL值就會(huì)減2
A.11001010 01110000 01101100 10011110 B.11001010 01101100 01101100 10011001 C.10110011 11001110 10010001 00110110 D.01110111 01111100 01110111 01110110