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Computer Networking

Computer Networking
Which utility is useful for finding the local host name?

None of these
NBTSTAT
Netstat
Hostname
PING

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Computer Networking
Which of the following are TCP/IP protocols used at the Application layer of the OSI model?1. IP2. TCP3. Telnet4. FTP5. TFTP

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

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Computer Networking
The CCITT Recommendation X.25 specifies three layers of communications:

physical datalink and network
datalink, network and transport
None of these
Session, transport and network
application, presentation and session

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Computer Networking
How often are BPDUs sent from a layer 2 device?

Every 30 seconds
Every 10 minutes
Every 2 seconds
Never

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Computer Networking
Which transmission mode is used for data communication along telephone lines?

Asynchronous
Serial
Parallel
Synchronous
None of these

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Computer Networking
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

Restart the virtual circuit.
Decrease the window size.
Send a different source port number.
Decrease the sequence number.

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