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Computer Networking

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

All of these
cursor
None of these
wand
light pen

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Computer Networking
What is the minimum number of wires needed to send data over a serial communication link layer?

4
2
6
1
None of these

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Computer Networking
What can cause a problem with communication with a client by name but not by IP address?

The IP address
Subnet mask
The default gateway
Static files such as an LMHOSTS file or a DNS database
None of these

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Computer Networking
If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?

172.16.45.0
172.16.45.12
172.16.45.4
192.168.10.126
172.16.45.8

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Computer Networking
Which of the following might be used by a company to satisfy its growing communications needs?

front-end processor
multiplexer
controller
concentrator
All of these

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Computer Networking
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?

8 kbps
64 kbps.
32 kbps
128 kbps
None of these

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