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Computer Networking

Computer Networking
In cyclic redundancy checking what is the CRC?

the dividend
None of these
the remainder
the quotient
the divisor

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Computer Networking
Data communications system depends on four fundamental characteristics

Sender
Timeliness
Receiver
Medium

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Computer Networking
Which of the following are disadvantages of using NAT?1. Translation introduces switching path delays.2. Conserves legally registered addresses.3. Causes loss of end-to-end IP traceability.4. Increases flexibility when connecting to the Internet.5. Certain applications will not function with NAT enabled.6. Reduces address overlap occurrence.

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

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Computer Networking
Which command is used to upgrade an IOS on a Cisco router?

copy tftp run
config net
copy tftp start
copy tftp flash

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Computer Networking
A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.

500 Kbps
8 Kbps
64 Kbps
None of these
32 Kbps

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Computer Networking
Which of the following allows a simple email service and is responsible for moving messages from one mail server to another?

IMAP
POP3
SMTP
DHCP
FTP

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