Computer Networking
Suppose that you have a customer who has a central HQ and six branch offices. They anticipate adding six more branches in the near future. They wish to implement a WAN technology that will allow the branches to economically connect to HQ and you have no free ports on the HQ router. Which of the following would you recommend?

HDLC
PPP
Frame Relay
ISDN

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Computer Networking
Modulation is the process of

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

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