Discussion
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- Question
Who originally designed TCP/IP?
Options- A. The Department of Defense
- B. Novell
- C. IBM
- D. Xerox
- Correct Answer
- The Department of Defense
- 1. A modulator converts a _____ signal to a(n) _____ signal.
Options- A. FSK; PSK
- B. PSK; FSK
- C. analog; digital
- D. digital; analog
- E. None of the above Discuss
- 2. What is the minimum number of wires required for sending data over a serial communications links?
Options- A. 2
- B. 1
- C. 4
- D. 3
- E. None of the above Discuss
- 3. A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission rate?
Options- A. 1.5 Mbaud/sec
- B. 6 Mband/sec
- C. 12 Mbaud/sec
- D. 24 Mbaud/sec
- E. None of the above Discuss
- 4. How many OSI layers are covered in the X.25 standard?
Options- A. two
- B. three
- C. seven
- D. six
- E. None of the above Discuss
- 5. The systematic access of small computers in a distributed data processing system is referred to as:
Options- A. dialed service
- B. multiplexing
- C. polling
- D. conversational mode
- E. None of the above Discuss
- 6. To set up a bulletin board system you need
Options- A. a smart modem with auto-answer capabilities
- B. a telephone line
- C. a personal computer
- D. All of the above
- E. None of the above Discuss
- 7. Synchronous protocols
Options- A. transmit characters one at a time
- B. allow faster transmission than asynchronous protocols do
- C. are generally used by personal computers
- D. are more reliable
- E. None of the above Discuss
- 8. Number of bits per symbol used in Baudot code is
Options- A. 1
- B. 5
- C. 8
- D. 9
- E. None of the above Discuss
- 9. If odd parity is used for ASCII error detection, the number of 0s per eight-bit symbol is _____.
Options- A. even
- B. odd
- C. indeterminate
- D. 42 Discuss
- 10. An example of a medium-speed, switched communications service is
Options- A. Series 1000
- B. Dataphone 50
- C. DDD
- D. All of the above
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: digital; analog
Correct Answer: 2
Correct Answer: 12 Mbaud/sec
Correct Answer: three
Correct Answer: polling
Correct Answer: All of the above
Correct Answer: allow faster transmission than asynchronous protocols do
Correct Answer: 5
Correct Answer: odd
Correct Answer: DDD
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