正确答案: BC

A device listens and waits until the media is not busy before transmitting. All devices on an Ethernet segment see data that passes on the network medium.

题目：With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

解析：解析：Explanation:

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学习资料的答案和解析：

[单选题]介质工作在OSI的哪一层（）

物理层

[单选题]An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?

Keepalives are being received on the interface.

解析：解析：Explanation:

[单选题]The network administrator has configured port security on a Ezonexam switch. Why would a network administrator configure port security on this Ezonexam device?

To prevent unauthorized hosts from getting access to the LAN

解析：解析：Explanation:

[多选题]You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network? (Choose three)

Congestion avoidance

Windowing

Buffering

[多选题]What are two characteristics of "store and forward" switching? (Select two answer choices)

The switch receives the complete frame. before beginning to forward it.

Latency through the switch varies with frame. length.

解析：解析：Explanation: