A.數(shù)據(jù)報(bào) B.點(diǎn)對(duì)點(diǎn) C.廣播 D.虛電路
A.編碼 B.解碼 C.調(diào)制 D.解調(diào)
A.192.19.0.23 B.193.0.25.37 C.225.21.0.11 D.170.23.0.1