Computer Networking
The Acme Corporation is implementing dial-up services to enable remote-office employees to connect to the local network. The company uses multiple routed protocols, needs authentication of users connecting to the network, and since some calls will be long distance, needs callback support. Which of the following protocols is the best choice for these remote services?

PAP
802.1
Frame Relay
HDLC
PPP

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Computer Networking
A T-switch is used to

None of these
rearrange the connections between computing equipment
echo every character that is received
transmit characters one at a time
control how messages are passed between computers

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