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Computer Networking

Computer Networking
Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

xDSL
Cable
IPSec
VPN
HDLC

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Computer Networking
An error-detecting code inserted as a field in a block of data to be transmitted is known as

Frame check sequence
Error detecting code
Checksum
None of these
flow control

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Computer Networking
Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

255.255.255.0, 255.255.0.0, 255.0.0.0
255.255.0.0, 255.255.255.0, 255.255.255.255
0.0.0.0, 0.0.0.1, 0.0.1.1
255.0.0.0, 255.255.0.0, 255.255.255.0
None of these

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Computer Networking
On a class B network, how many hosts are available at each site with a subnet mask of 248?

16,382
1,022
2,046
4,094
8,190

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Computer Networking
Which of the following summation operation is performed on the bits to check an error-detecting code?

Attenuation
None of these
Coder-decoder
Codec
Checksum

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Computer Networking
A terminal multiplexer has six 1200 bps terminals and 'n' 300bps terminals connected to it. The outgoing line is 9600bps. What is the maximum value of n?

8
4
28
16

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