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Computer Networking

Computer Networking
What is the port number for HTTP?

80
23
None of these
86
99

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Computer Networking
Which of the following services use TCP?1. DHCP2. SMTP3. HTTP4. TFTP5. FTP

2, 3 and 5
1 and 2
1, 2 and 4
1, 3 and 4

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Computer Networking
If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?

Ctrl+X, then 6
Ctrl+Shift+X, then 6
Ctrl+Shift+6, then X
Tab+Spacebar

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Computer Networking
In OSI network architecture, the dialogue control and token management are responsibilities of

session layer
transport layer
None of these
network layer
data link 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
0.009
0.991
0.003
0.999

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Computer Networking
In which of the following technologies is the term HFC used?

Frame Relay
DSL
Dedicated T1
PPPoE

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