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Computer Networking

Computer Networking
Which of the following network access standard is used for connecting stations to a circuit-switched network?

X.75
X.25
X.3
None of these
X.21

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Computer Networking
The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to

0.009
0.999
0.991
None of these
0.003

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Computer Networking
Distributed Queue Dual Bus is a standard for

WAN
LAN and MAN
LAN
Wireless LAN
MAN

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Computer Networking
What frequency range is used for microwave communications, satellite and radar?

Extremely High Frequency :30,000 MHz
Medium Frequency : 300 kHz to 3 MHz
Super High Frequency : 3000 MHz to 30000 MHz
None of these
Low Frequency : 30 kHz to 300 kHz

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Computer Networking
Which protocol is used to send a destination network unknown message back to originating hosts?

TCP
BootP
ARP
ICMP

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Computer Networking
Stephanie is in charge of a small network and wants to make it simple but secure. The users want to have full control over their data and still be able to share data with the rest of the office. The networking knowledge of the office staff is basic. Which network(s) would be the best for Stephanie to set up?

Share-level
WAN
Master domain
Server-based
Peer-to-peer

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