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問答題switchort port-security violation選擇shutdown表示什么意思？

1.問答題What is the purpose of an administrative distance？

2.問答題what is the attributes that are required to be sent to BGP neighbors？

3.問答題NBAR is a Cisco IOS feature that can be used to perform three tasks？

4.問答題GLBP benefit？

5.問答題What is redirect？

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