Exam 210-260 Question id=672 Secure Routing and Switching

When a switch has multiple links connected to a downstream switch, what is the first step that STP takes to prevent loops?

A. STP elects the root bridge
B. STP selects the root port
C. STP selects the designated port
D. STP blocks one of the ports


the answers are mixed, do not specify in the comment number or the letter of the answer
please write answer#A instead A, answer#B instead B...

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