A.模擬信號(hào)B.數(shù)字信號(hào)C.語(yǔ)音信號(hào)D.階躍信號(hào)
A.資源子網(wǎng)B.個(gè)域網(wǎng)C.通信子網(wǎng)D.邊緣部分
A.公用網(wǎng)/專用網(wǎng)B.局域網(wǎng)/廣域網(wǎng)C.局域網(wǎng)/網(wǎng)狀網(wǎng)D.總形網(wǎng)/星形網(wǎng)