Computer Networking
Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

OSI
Network operating system
Network Server
Virtual Private Network

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Computer Networking
Demodulation is a process of

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

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