A.不堅(jiān)持、1-堅(jiān)持、II-堅(jiān)持 B.不堅(jiān)持、1-堅(jiān)持、P-堅(jiān)持 C.不堅(jiān)持、1-堅(jiān)持、N-堅(jiān)持 D.不堅(jiān)持、1-堅(jiān)持、連續(xù)堅(jiān)持
A.TCP、UDP B.無(wú)連LLC、面向連接LLC C.物理層和數(shù)據(jù)鏈路層 D.網(wǎng)絡(luò)層和傳輸層
A.MAC子層和LLC子層B.IP子層和MAC子層C.MAC子層和TCP子層D.LLC子層和ICMP子層