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Computer Networking

Computer Networking
Which of the following device is used to connect two systems, especially if the systems use different protocols?

gateway
bridge
hub
repeater
None of these

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Computer Networking
How many hosts are attached to each of the local area networks at your site?

128
256
None of these
254
64

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Computer Networking
Which of the following performs modulation and demodulation?

None of these
satellite
modem
fiber optic
coaxial cable

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Computer Networking
A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission rate?

1.5 Mbaud/sec
24 Mbaud/sec
12 Mbaud/sec
6 Mband/sec
None of these

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Computer Networking
ASK, PSK, FSK, and QAM are examples of _____ encoding.

analog-to-analog
digital-to-analog
None of these
digital-to-digital
analog-to-digital

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Computer Networking
Which of the following are valid ways to refer only to host 172.16.30.55 in an IP access list? 1. 172.16.30.55 0.0.0.255 2. 172.16.30.55 0.0.0.0 3. any 172.16.30.55 4. host 172.16.30.55 5. 0.0.0.0 172.16.30.55 6. ip any 172.16.30.55

1, 4 and 6
2 and 4
3 and 5
1 and 4

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