Computer Networking
You are connecting your access point and it is set to root. What does Extended Service Set ID mean?

That you have more than one access point and they are in separate SSIDs connected by a distribution system.
That you have multiple access points, but they are placed physically in different buildings.
That you have multiple access points, but one is a repeater access point.
That you have more than one access point and they are in the same SSID connected by a distribution system.

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To create collision domains
To prevent switching loops in networks with redundant switched paths
To manage the VLAN database across multiple switches
To provide a mechanism for network monitoring in switched environments
To prevent routing loops in networks with redundant paths

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