A.以太網(wǎng)協(xié)議 B.藍(lán)牙協(xié)議 C.無(wú)線局域網(wǎng)協(xié)議 D.無(wú)線擴(kuò)頻協(xié)議
A.無(wú)確認(rèn)的無(wú)連接服務(wù) B.有確認(rèn)的無(wú)連接服務(wù) C.無(wú)確認(rèn)的面向連接服務(wù) D.有確認(rèn)的面向連接服務(wù)
A.模擬數(shù)據(jù)轉(zhuǎn)換為模擬信號(hào) B.模擬信號(hào)轉(zhuǎn)換為數(shù)字信號(hào) C.數(shù)字?jǐn)?shù)據(jù)轉(zhuǎn)換為模擬信號(hào) D.數(shù)字?jǐn)?shù)據(jù)轉(zhuǎn)換成數(shù)字信號(hào)