| Q.1. What device separates a single network into two segments but lets the two segments appear as one to higher protocols? |
|---|
| a.Switch b.Gateway c.Bridge d.Router |
| Answer: c |
Q.2. What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard? |
| a. 4 b. 2 c. 3 d. 6 |
| Answer: c |
Q.3. Frames from one LAN can be transmitted to another LAN via the device |
| a. Router b. Bridge c. Repeater d. Modem |
| Answer: b |
Q.4. Which of the following condition is used to transmit two packets over a medium at the same time? |
| 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. simplex lines b. half-duplex lines c. full duplex lines d. biflex-lines |
| Answer: b |
Q.6. Which of the following statement is incorrect? |
| a. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission. b. Half duplex line is a communication line in which data can move in two directions, but not at the same time. c. Teleprocessing combines telecommunications and DP techniques in online activities. d. Batch processing is the prefered processing mode for telecommunication operation. |
| Answer: d |
Q.7. Which of the following is considered a broad band communication channel? |
| a. coaxial cable b. fiber optics cable c. microwave circuits d. All of the above |
| Answer: d |
Q.8. Which of the following is not a transmission medium? |
| a. telephone lines b. coaxial cables c. modem d. microwave systems |
| Answer: c |
Q.9. Which of the following does not allow multiple uses or devices to share one communication line? |
| a. doubleplexer b. multiplexer c. concentrator d. controller |
| Answer: a |
Q.You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign? |
| a. 255.240.0.0 b. 255.248.0.0 c. 255.252.0.0 d. 255.254.0.0 |
| Answer: d |
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