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Computer Networking

Computer Networking
The OCR reading unit attached to a POS terminal is called a

light pen
wand
All of these
None of these
cursor

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Computer Networking
IEEE project 802 divides the data link layer into an upper _____ sublayer and a lower _____ sublayer.

HDLC, PDU
PDU, HDLC
MAC, LLC
LLC, MAC
None of these

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

Half Duplex
Simplex
All of these
Full Duplex

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Computer Networking
A network administrator wants to upgrade the IOS of a router without removing the image currently installed. What command will display the amount of memory consumed by the current IOS image and indicate whether there is enough room available to hold both the current and new images?

show version
show memory
show buffers
show flash

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Computer Networking
Modulation in which the two binary values are represented by two different amplitudes of the carrier frequency is known as

Amplitude
None of these
Aloha
Amplitude modulation
Amplitude-shift keying

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Computer Networking
If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is

None of these
1200 bands
3200 bands
4800 bands
9600 bands

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