11. Two devices are in network if ________________
- A process in one device is able to exchange information with a process in another device
- A process is running on both devices
- A process is active and another is inactive
- PIDs of the processes running of different devices are same
Answer : A Explanation: Two devices are in network if a process in one device is able to exchange information with a process in another device. So, option A is correct.
12. Which of the following transmission directions listed is not a legitimate channel?
- Simplex
- Double Duplex
- Full Duplex
- Half Duplex
Answer : B Explanation: Double duplex is not a legitimate channel for transmission in computer network and hence, option B is correct.
13. Which of the following device is used to connect two systems, especially if the systems use different protocols?
- Repeater
- Bridge
- Hub
- Gateway
Answer : D Explanation: Gateway is used to connect two systems, especially if the systems use different protocols.
14. In an OSI model architecture which layer transmits the error-free frames?
- Physical layer
- Transport layer
- Datalink layer
- Network layer
Answer : C Explanation: In an OSI model architecture Datalink layer transmits the error-free frames?
15. In computer network nodes are:
- The computer that terminates the data
- The computer that originates the data
- The computer that routes the data
- All of the above
Answer : D Explanation: In a computer network, a node can be anything that is capable of sending or receiving data or routing the data to the destination. So, all of the above is correct.
16. Which one of the following computer network is built on the top of another network?
- Overlay network
- Prime network
- Prior network
- Chief network
Answer : A Explanation: Overlay network is a computer network that is built on the top of another network. So, option A is correct.
17. Error detection at the data link level is achieved by:
- Bit Stuffing
- Equalization
- Cyclic Redundancy Code
- Hamming Code
Answer : C Explanation: Error detection at the data link level is achieved by Cyclic Redundancy Code.
18. Which of the following best describes uploading information?
- Receiving information from a host computer
- Sorting data on a hard drive
- Sorting data on a disk drive
- Sending information to a host computer
Answer : D Explanation: Sending information to a host computer can be described as uploading information.
19. The fault tolerance is the ability of the computer network to ______
- Ensure no loss of service
- Continue working despite failures
- Both of the above
- None of the above
Answer : C Explanation: The fault tolerance is the ability of the computer network to : Ensure no loss of service and Continue working despite failures.
20. In asynchronous serial communication the physical layer provides:
- Start and stop signaling
- Flow control
- Both of the above
- None of the above
Answer : C Explanation: Both of the above is the correct answer.
