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check this link
www.en.wikipedia.org/wiki/Spanning_tree_protocol

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Posted by waqasahmad

The answer is
12 Collision and 1 broadcast domain

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Posted by HamidAliKhan

12 collision domains, 1 broadcast domain. Each port on a switch is a collision domain.

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Posted by jame_kristopher

12 Collision and 1 broadcast domain.

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Posted by sagitraz

Please visit:
www.en.wikipedia.org/wiki/Spanning_tree_protocol

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Posted by sagitraz