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Computer Networking

Computer Networking
Which of the following device copies electrical signals from one Ethernet to another?

bridge
None of these
passive hub
repeater
hub

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Computer Networking
What is the main reason the OSI model was created?

So different networks could communicate.
So Cisco could use the model.
To create a layered model larger than the DoD model.
So application developers can change only one layer's protocols at a time.

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Computer Networking
If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?

Ctrl+Shift+6, then X
Ctrl+Shift+X, then 6
Tab+Spacebar
Ctrl+X, then 6

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Computer Networking
A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as

modem
Amplitude modulation
None of these
Aloha
Angle modulation

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Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 2, 1, none
3, 3, 2, none
All of these
3, 3, 1, 7
3, 2, 1, 7

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Computer Networking
Compared to analog signals, digital signals

are more accurate
None of these
allow faster transmission
both A and B
All of these

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