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Computer Networking

Computer Networking
Which encapsulations can be configured on a serial interface?1. Ethernet2. Token Ring3. HDLC4. Frame Relay5. PPP

3, 4 and 5
1 and 4
2 only
All of these

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Computer Networking
How many Character per sec(7bits + 1parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 "Start" and 1 "stop" bit)?

300
240
275
250

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Computer Networking
Where is a hub specified in the OSI model?

Physical layer
Session layer
Data Link layer
Application layer

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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

None of these
0.991
0.003
0.009
0.999

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Computer Networking
You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This assumes support for eight subnets. What subnet mask should you use?

255.255.192.0
255.255.248.0
255.255.224.0
255.255.240.0
255.255.255.0

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Computer Networking
In a broad Sense, a railway track is an example of

Full Duplex
Simplex
Half Duplex
All of these

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