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?

PPP
Frame Relay
ISDN
HDLC

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

a method of determining which device has access to the transmission medium at any time
None of these
network access standard for connecting stations to a circuit-switched network
a method access control technique for multiple-access transmission media.
a very common bit-oriented data link protocol issued by ISO.

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