A.16 B.2 C.unlimited D.4
A.255.255.255.0 B.255.255.255.128 C.255.255.255.192 D.255.255.255.224 E.255.255.255.240 F.以上都不對(duì)!
A.在信道上傳輸原始的比特流 B.加強(qiáng)物理層數(shù)據(jù)傳輸原始比特流的功能并且進(jìn)行流量調(diào)控 C.確定數(shù)據(jù)包從源端到目的端如何選擇路由 D.確保到達(dá)對(duì)方的各段信息正確無(wú)誤