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Computer Networking

Computer Networking
On a class B network, how many subnets are available with a subnet mask of 248?

30
126
6
2
62

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Computer Networking
In OSI model, which of the following layer transforms information from machine format into that understandable by user

application
physical
session
None of these
presentation

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Computer Networking
You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask?

2
4
5
3

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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

0.991
0.003
0.009
0.999
None of these

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Computer Networking
The EIA-232 interface has _____ pins.

None of these
25
20
30
24

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Computer Networking
You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?

255.255.255.192
255.255.255.240
255.255.255.224
255.255.255.252
255.255.255.248

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