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- Question
When UPC is used, the price of the item is located
Options- A. on the item
- B. on the item and on the shelf
- C. in computer storage
- D. on the shelf and in computer storage
- E. None of the above
- Correct Answer
- on the shelf and in computer storage
- 1. A network that requires human intervention of route signals is called a
Options- A. bus network
- B. ring network
- C. star network
- D. T-switched network
- E. None of the above Discuss
- 2. Which of the following communications service provides message preparation and transmission facilities?
Options- A. Teletex
- B. Teletext
- C. x400
- D. Fax
- E. None of the above Discuss
- 3. A decrease in magnitude of current, voltage, a power of a signal in transmission between points, is known as
Options- A. Attenuation
- B. Amplitude
- C. Aloha
- D. Carrier
- E. None of the above Discuss
- 4. Error control is needed at the transport layer because of potential errors occurring _____.
Options- A. from transmission line noise
- B. in routers
- C. from out-of-sequence delivery
- D. from packet losses. Discuss
- 5. The difference between a multiplexer and a statistical multiplexer is
Options- A. Statistical multiplexers need buffers while multiplexers do not need buffers
- B. Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
- C. Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
- D. Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
- E. None of the above Discuss
- 6. Which of the following device copies electrical signals from one Ethernet to another?
Options- A. bridge
- B. repeater
- C. hub
- D. passive hub
- E. None of the above Discuss
- 7. Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:
Options- A. TCP/IP
- B. Protocol
- C. Open Systems
- D. Internetwork processor Discuss
- 8. Which of the following network access standard is used for connecting stations to a packet-switched network?
Options- A. X.3
- B. X.21
- C. X.25
- D. X.75
- E. None of the above Discuss
- 9. A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.
Options- A. 500 Kbps
- B. 32 Kbps
- C. 8 Kbps
- D. 64 Kbps. Discuss
- 10. If communication software can be called the "traffic cop" of a micro communication system, then what should the modem be called?
Options- A. Park
- B. Bridge
- C. Interface
- D. Link
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: T-switched network
Correct Answer: Teletex
Correct Answer: Attenuation
Correct Answer: in routers
Correct Answer: Statistical multiplexers need buffers while multiplexers do not need buffers
Correct Answer: repeater
Correct Answer: Internetwork processor
Correct Answer: X.25
Correct Answer: 64 Kbps.
Correct Answer: Bridge
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