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
HDLC
Frame Relay
802.1
PPP

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Computer Networking
The main difference between TCP and UDP is

TCP is an Internet protocol where as UDP is an ATM protocol
UDP is connection oriented where as TCP is datagram service
UDP is a datagram where as TCP is a connection oriented service
All of these
None of these

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Computer Networking
The application layer of a network

consists of software being run on the computer connected to the network
None of these
All of these
establishes, maintains, and terminates virtual circuits
defines the user's port into the network

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