Discussion
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- Question
Avalanche photodiode receivers can detect hits of transmitted data by receiving
Options- A. 100 photons
- B. 200 photons
- C. 300 photons
- D. 400 photons
- E. None of the above
- Correct Answer
- 200 photons
- 1. Which of the following is not a disadvantage of wireless LAN?
Options- A. Slower data transmission
- B. higher error rate
- C. interference of transmissions from different computers
- D. All of the above Discuss
- 2. How many digits of the DNIC (Data Network Identification Code) identify the country?
Options- A. first three
- B. first four
- C. first five
- D. first six
- E. None of the above Discuss
- 3. A front-end processor is
Options- A. a user computer system
- B. a processor in a large-scale computer that executes operating system instructions
- C. a minicomputer that relieves main-frame computers at a computer centre of communications control functions
- D. preliminary processor of batch jobs.
- E. None of the above Discuss
- 4. Which of the following types of channels moves data relatively slowly?
Options- A. wideband channel
- B. voiceband channel
- C. narrowband channel
- D. broadband channel
- E. None of the above Discuss
- 5. The slowest transmission speeds are those of
Options- A. twisted-pair wire
- B. coaxial cable
- C. fiber-optic cable
- D. microwaves Discuss
- 6. Carrier is
Options- A. One or more conductors that serve as a common connection for a related group of devices
- B. a continuous frequency capable of being modulated or impressed with a second signal
- C. the condition when two or more sections attempt to use the same channel at the same time
- D. a collection of interconnected functional units that provides a data communications service among stations attached to the network
- E. None of the above Discuss
- 7. A distributed network configuration in which all data/information pass through a central computer is
Options- A. bus network
- B. star network
- C. ring network
- D. Point-to-point network
- E. None of the above Discuss
- 8. Which of the following is used for modulation and demodulation?
Options- A. modem
- B. protocols
- C. gateway
- D. multiplexer
- E. None of the above Discuss
- 9. Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?
Options- A. 10
- B. 12
- C. 120
- D. 1200
- E. None of the above Discuss
- 10. What is the default subnet mask for a class C network?
Options- A. 127.0.0.1
- B. 255.0.0.0
- C. 255.255.0.0
- D. 255.255.255.0
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: All of the above
Correct Answer: first three
Correct Answer: a minicomputer that relieves main-frame computers at a computer centre of communications control functions
Correct Answer: narrowband channel
Correct Answer: twisted-pair wire
Correct Answer: a continuous frequency capable of being modulated or impressed with a second signal
Correct Answer: star network
Correct Answer: modem
Correct Answer: 120
Correct Answer: 255.255.255.0
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