A. 50ms B. 30ms C. 20ms D. 10ms
A.數(shù)據(jù)業(yè)務(wù) B.語音業(yè)務(wù) C.專線業(yè)務(wù) D.電信級以太網(wǎng)業(yè)務(wù)
A.GPRS無線傳輸及以太網(wǎng)傳輸混合模式 B.以太網(wǎng)傳輸模式 C.GPRS無線傳輸模式 D.WLAN