Computer Networking
Business meeting and conferences can be held by linking distantly located people through a computer network. Not only the participants exchange information but are able to see each other. What is it called?

None of these
Telemailing
Telemeeting
Teleconferencing
Teletalking

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

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

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