[单选题]交换机工作在OSI七层模型的哪一层()

正确答案 ：B

数据链路层

[多选题]Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)

正确答案 ：BDE

A jam signal informs all devices that a collision occurred.

The devices that are involved in the collision stops transmitting for a short time.

The collision invokes a random back-off algorithm.

解析：解析：Explanation:

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