A.X.25 B.幀中繼 C.dialer D.同/異步串口
A.Filtering can occur based on Layer 3 information. B.Broadcasts are eliminated. C.Routers generally cost less than switches. D.Broadcasts are not forwarded across the router. E.Adding a router to the network decreases latency.
A.數(shù)據(jù)加密 B.數(shù)據(jù)壓縮 C.密碼控制 D.數(shù)據(jù)格式轉(zhuǎn)換