Posted by: Pdfprep
Post Date: October 27, 2020
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
Answer: A
Explanation:
First when the switches are powered on all the ports are in Blocking state (20 sec), during this time the + Root Bridge is elected by exchanging BPDUs
+ The other switches will elect their Root ports
+ Every network segment will choosee their Designated port
Source: https://learningnetwork.cisco.com/thread/7677
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