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Computer Networking

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

wand
None of these
All of these
cursor
light pen

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Computer Networking
Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologies.

ARP.EXE
81
729
48
12

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Computer Networking
Which of the following are advantages 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 4
2, 4 and 6
3, 5 and 6
5 and 6

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Computer Networking
The slowest transmission speeds are those of

twisted-pair wire
fiber-optic cable
microwaves
coaxial cable

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Computer Networking
Which of the following command options are displayed when you use the Router# show frame-relay ? command?1. dlci2. neighbors3. lmi4. pvc5. map

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

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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?

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

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