Computer Networking
Switching at the network layer in the Internet uses the datagram approach to:

Message switching
IP switching
Packet switching
Circuit switching

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

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

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