Jeremy's IT Lab CCNA Root Guard Day 21

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Last updated 6:58 AM on 7/24/26
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6 Terms

1
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A port disabled by Root Guard will be re-enabled when [...].

it stops receiving superior BDPUs

2
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Enable Root Guard on a port:SW1(config-if)# [...]

spanning-tree guard root

3
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If a Root Guard-enabled port receives a superior BPDU, it will enter the [...] state.

Broken (Root Inconsistent)

4
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In the output of show spanning-tree, what does BKN mean?

Broken (e.g. disabled by Root Guard)

5
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In the output of show spanning-tree, what does ROOT_Inc mean?

Root Inconsistent

6
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Root Guard disables a port if [...].

it receives a superior BPDU