Computer Networking
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?

Interface
Teleprocessor
None of these
Attenuation
Modem

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Computer Networking
What is a stub network?

A network with more than one exit point.
A network with more than one exit and entry point.
A network that has only one entry and exit point.
A network with only one entry and no exit point.

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Computer Networking
Which three statements are true about the operation of a full-duplex Ethernet network?1. There are no collisions in full-duplex mode.2. A dedicated switch port is required for each full-duplex node.3. Ethernet hub ports are preconfigured for full-duplex mode.4. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.5. The host network card and the switch port must be capable of operating in full-duplex mode.

1, 2, and 5
2 and 4
2, 3 and 4
5 only

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