A.競爭的訪問機制,不能保證網(wǎng)絡在大負荷時的數(shù)據(jù)傳輸 B.競爭的訪問機制,可以保證網(wǎng)絡在大負荷時的數(shù)據(jù)傳輸 C.數(shù)據(jù)傳輸依靠令牌,不能保證網(wǎng)絡在大負荷時的數(shù)據(jù)傳輸 D.數(shù)據(jù)傳輸依靠令牌,可以保證網(wǎng)絡在大負荷時的數(shù)據(jù)傳輸
A.傳送數(shù)據(jù)→建立數(shù)據(jù)鏈路→傳輸結束撤消鏈路 B.建立數(shù)據(jù)鏈路→傳輸結束撤消鏈路→傳送數(shù)據(jù) C.建立數(shù)據(jù)鏈路→傳送數(shù)據(jù)→傳輸結束撤消鏈路 D.傳輸結束撤消鏈路→傳送數(shù)據(jù)→建立數(shù)據(jù)鏈路