单选题Which of the following are true of Ethernet technology?（）AHosts use a logical ring topology.BHosts use a logical bus topologyCHosts must wait for an electronic signal to transfer data.DHosts are directly connected to a wiring concentrator called a MSAU.
单选题
Which of the following are true of Ethernet technology?（）
A
Hosts use a logical ring topology.
B
Hosts use a logical bus topology
C
Hosts must wait for an electronic signal to transfer data.
D
Hosts are directly connected to a wiring concentrator called a MSAU.
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