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Computer Networking

Computer Networking
Internet-like networks within an enterprise.

Extranets
Inter organizational networks
Intranets
Switching alternating

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Computer Networking
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?

8 kbps
128 kbps
None of these
32 kbps
64 kbps.

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Computer Networking
You are working with a network that has the network ID 172.16.0.0, and you require 25 subnets for your company and an additional 30 for the company that will merge with you within a month. Each network will contain approximately 600 nodes. What subnet mask should you assign?

255.255.252.0
255,255.248.0
255.255.240.0
255.255.192.0
255.255.224.0

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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
0.003
None of these
0.991

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Computer Networking
A central computer surrounded by one or more satellite computers is called a

None of these
All of these
star network
ring network
bus network

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Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 2, 1, 7
3, 2, 1, none
3, 3, 2, none
All of these
3, 3, 1, 7

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