| Q.1. Which of the following is an advantage to using fiber optics data transmission? |
|---|
| a.resistance to data theft b.fast data transmission rate c.low noise level d.all of above |
| Answer: d |
Q.2. Which of the following is required to communicate between two computers? |
| a. communications software b. protocol c. communication hardware d. all of above including access to transmission medium |
| Answer: d |
Q.3. The transmission signal coding method of TI carrier is called |
| a. Bipolar b. NRZ c. Manchester d. Binary |
| Answer: a |
Q.4. . How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communications with the host? |
| a. Contention b. Synchronous c. Asynchronous d. Collision |
| Answer: d |
Q.5. The interactive transmission of data within a time sharing system may be best suited to |
| a. 16 - bits b. 32 - bits c. 48 - bits d. 64 - bits |
| Answer: b |
Q.6. With an IP address of 100, you currently have 80 subnets. What subnet mask should you use to maximize the number of available hosts? |
| a. 192. b. 252. c. 240. d. 248. |
| Answer: b |
Q.7. Which of the following types of channels moves data relatively slowly? |
| a. wideband channel b. voiceband channel c. broadband channel d. narrowband channel |
| Answer: d |
Q.8. Which of the following is required to communicate between two computers? |
| a. communications software b. protocol c. communications hardware d. All of the above |
| Answer: d |
Q.9. A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as |
| a. Gateways b. mail gateway c. bridges d. User Agent |
| Answer: b |
Q.. If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is |
| a. 1200 bands b. 3200 bands c. 4800 bands d. 9600 bands |
| Answer: b |
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