Computer Networking
Demodulation is a process of

converting digital to analog signals
multiplexing various signals into one high speed line signals
converting analog to digital signals
performing data description.

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

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

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