11.  Two devices are in network if ________________

1. A process in one device is able to exchange information with a process in another device
2. A process is running on both devices
3. A process is active and another is inactive
4. PIDs of the processes running of different devices are same

12. Which of the following transmission directions listed is not a legitimate channel?

1. Simplex
2. Double Duplex
3. Full Duplex
4. Half Duplex

13. Which of the following device is used to connect two systems, especially if the systems use different protocols?

1. Repeater
2. Bridge
3. Hub
4. Gateway

14. In an OSI model architecture which layer transmits the error-free frames?

1. Physical layer
2. Transport layer
3. Datalink layer
4. Network layer

15. In computer network nodes are:

1. The computer that terminates the data
2. The computer that originates the data
3. The computer that routes the data
4. All of the above

16. Which one of the following computer network is built on the top of another network?

1. Overlay network
2. Prime network
3. Prior network
4. Chief network

17. Error detection at the data link level is achieved by:

1. Bit Stuffing
2. Equalization
3. Cyclic Redundancy Code
4. Hamming Code

18. Which of the following best describes uploading information?

1. Receiving information from a host computer
2. Sorting data on a hard drive
3. Sorting data on a disk drive
4. Sending information to a host computer

19. The fault tolerance is the ability of the computer network to ______

1. Ensure no loss of service
2. Continue working despite failures
3. Both of the above
4. None of the above

20. In asynchronous serial communication the physical layer provides:

1. Start and stop signaling
2. Flow control
3. Both of the above
4. None of the above