Computer Networking
Modulation is the process of

converting analog signals to digital signals
performing data encryption.
Multiplexing various signals into high speed line signals
converting digital signals to analog signals

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

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

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