[单选题]默认情况下，RIP定期发送路由更新的时间是（）

正确答案 ：B

30S

[单选题]What is the purpose of the Spanning Tree Protocol (STP)?

正确答案 ：D

To maintain a loop-free Layer 2 network topology

解析：解析：Explanation:

[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)

正确答案 ：ABD

Create the VLAN.

Name the VLAN.

Add the desired ports to the new VLAN.

解析：解析：Explanation:

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