A.4 B.3 C.2 D.6
A.直連網(wǎng) B.局域網(wǎng) C.本地網(wǎng) D.廣域網(wǎng)
A.廣域網(wǎng)B.局域網(wǎng)C.本地網(wǎng)D.直連網(wǎng)