A.10.151.192.101B.10.110.192.111C.10.110.191.111D.101.110.191.111
A.TOS B.TTL C.總長(zhǎng)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