Modulation is the process of converting analog signals to digital signals conver

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converting digital signals to analog signals

3. A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?
Options
A. 8000 B frame
B. 80,000 B frame
C. 8 x 10⁵ bit frame
D. 10,000 B frame

4. The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband.
Options
A. Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
B. Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
C. Baseband refers to local area networks, and broadband refers to wide area networks.
D. Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
E. Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions

5. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is
Options
A. question and answer
B. form filling
C. open-ended question
D. menu selection
E. None of the above

7. Which of the following refers to the terms "residual error rate"?
Options
A. the number of bit errors per twenty four hours of continuous operation on an asynchronous line
B. The probability that one or more errors will be undetected when an error detection scheme is used
C. the probability that one or more errors will be detected when an error detection mechanism is used
D. signal to noise ratio divided by the ratio of energy per bit to noise per hertz
E. None of the above

8. With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?
Options
A. 192
B. 224
C. 240
D. 248
E. 252

9. Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing, file transfer and network management?
Options
A. Layer 7 protocols
B. Layer 6 protocols
C. Layer 5 protocols
D. Layer 4 protocols
E. None of the above

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