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Computer Networking

Computer Networking
How many non-overlapping channels are available with 802.11b?

23
3
40
12

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Computer Networking
The signal to noise ratio for a voice grade line is 30.1 dB (decibels) or a power ratio of 1023:1. The maximum achievable data rate on this line whose spectrum ranges from 300 Hz to 4300 Hz is

9600 bps
None of these
31000 bps
6200 bps
34000 bps

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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?

Attenuation
Interface
Modem
Teleprocessor
None of these

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Computer Networking
A software that allows a personal computer to pretend it as a terminal is

terminal emulation
bulletin board
modem
None of these
auto-dialing

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Computer Networking
Operating system functions may include

input/output control
All of these
multiprogramming
virtual storage
None of these

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Computer Networking
Which utility is useful for finding the local host name?

PING
Netstat
NBTSTAT
None of these
Hostname

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