Quiz On Unit 2 Computer Network Class 11

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  • 1/15 Questions

    In Parallel transmission, bits are transmitted simultaneously, each across its own wire.

    • True
    • False
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About This Quiz

Are you studying in class 11 and just have started learning about computer networks? If so, check out this quiz based on the unit 2 computer network book and test your understanding of it. A computer network is a set of multiple interconnected devices within a network that can transmit, receive, and exchange data over the traffic. It is also See morereferred to as a data network. Learn more about the networks by playing the below quiz.

Quiz On Unit 2 Computer Network Class 11 - Quiz

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  • 2. 

    Which one of the transmission medias has the highest transmission speed in a network?

    • coaxial cable

    • twisted pair cable

    • optical fiber

    • electrical cable

    Correct Answer
    A. optical fiber
    Explanation
    Optical fiber has the highest transmission speed in a network compared to coaxial cable, twisted pair cable, and electrical cable. This is because optical fiber uses light signals to transmit data, which allows for extremely fast transmission speeds. Light signals can travel at very high speeds, allowing for greater bandwidth and faster data transfer rates. In contrast, coaxial cable, twisted pair cable, and electrical cable use electrical signals, which have slower transmission speeds. Therefore, optical fiber is the correct answer for the transmission media with the highest transmission speed in a network.

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  • 3. 

    Modem is a devices which modulates digital signals into analog signals that can be sent over traditional telephone lines?

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A modem is a device that converts digital signals from a computer into analog signals that can be transmitted over telephone lines. This allows for the transmission of data over traditional telephone networks. Therefore, the statement that modems modulate digital signals into analog signals is true.

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  • 4. 

    What does UTP stand for?

    • Unshielded Twisted pair

    • Uniformly twisted pair

    • Unshielded Connecter pair

    • None

    Correct Answer
    A. Unshielded Twisted pair
    Explanation
    UTP stands for Unshielded Twisted Pair. This refers to a type of cable commonly used for Ethernet connections. It consists of multiple pairs of twisted wires that are not shielded or protected by any additional covering. The twisting of the wires helps to reduce interference and crosstalk between the pairs, allowing for more reliable data transmission. UTP cables are widely used in networking and telecommunications applications.

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  • 5. 

    BNC terminator is used to prevent the reflection of the signal

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A BNC terminator is used to prevent the reflection of the signal. When a signal travels along a transmission line, it can encounter impedance mismatches at the end of the line. This can cause the signal to reflect back towards the source, resulting in signal degradation and interference. By terminating the line with a BNC terminator, the impedance is matched and the signal is absorbed, preventing reflections. This helps to maintain the integrity and quality of the signal being transmitted.

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  • 6. 

    The method of communication in which transaction takes place in both directions,but only in one direction at a time, is called ?

    • Simplex

    • Four wire circuit

    • Full duplex

    • Half-duplex

    Correct Answer
    A. Half-duplex
    Explanation
    Half-duplex is the method of communication in which the transaction takes place in both directions, but only in one direction at a time. In other words, the communication can either be in the send mode or receive mode, but not both simultaneously. This means that the sender and receiver cannot transmit and receive data at the same time.

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  • 7. 

    In asynchronous and synchronous serial transmission, bits are transmitted over a single wire, one at a time.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In both asynchronous and synchronous serial transmission, bits are sent one at a time over a single wire. This means that each bit is transmitted individually, rather than in groups or in parallel. Asynchronous transmission does not require a clock signal and each bit is accompanied by start and stop bits to indicate the beginning and end of a transmission. Synchronous transmission, on the other hand, relies on a clock signal to synchronize the sender and receiver, but still transmits bits one at a time. Therefore, the statement is true.

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  • 8. 

    Which one of the following is an advantages to using fiber optics data transmission?

    • resistance to data theft

    • fast data transmission rate

    • low noise level

    • all of above

    Correct Answer
    A. all of above
    Explanation
    Fiber optics data transmission has several advantages. Firstly, it provides resistance to data theft as it is difficult to tap into the transmission without physically accessing the fiber. Secondly, it offers a fast data transmission rate as it can transmit data at high speeds over long distances. Lastly, fiber optics has a low noise level, meaning that the signal is less prone to interference and distortion. Therefore, all of the given options are advantages of using fiber optics data transmission.

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  • 9. 

    Which of the following is not a transmission medium?

    • telephone lines

    • coaxial cables

    • Modem

    • microwave systems

    Correct Answer
    A. Modem
    Explanation
    A modem is not a transmission medium. A transmission medium refers to the physical path through which data is transmitted from one device to another. Telephone lines, coaxial cables, and microwave systems are all examples of transmission mediums because they provide a means for data to be transmitted. However, a modem is a device that modulates and demodulates signals to enable communication between a computer and an internet service provider. It is not a physical medium itself, but rather a device that facilitates communication over a transmission medium.

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  • 10. 

    STP cable is mostly used by Unix System

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is incorrect. STP (Shielded Twisted Pair) cable is not specifically used by Unix systems. STP cables are used in networking to reduce electromagnetic interference and are commonly used in both Unix and non-Unix systems. Therefore, the correct answer is False.

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  • 11. 

    Transmission media lie below the _______ layer.

    • Physical

    • Network

    • Transport

    • Application

    Correct Answer
    A. Physical
    Explanation
    The correct answer is physical. The transmission media, such as cables or wireless signals, are the physical means through which data is transmitted. They are responsible for carrying the data from one point to another, and they operate at the lowest layer of the networking model. The physical layer is responsible for the physical transmission of bits over the transmission media.

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  • 12. 

    BNC connectors are used in ....

    • Coaxial cable

    • Fiber optic cable

    • Twisted pair cable

    • All of the above

    Correct Answer
    A. Coaxial cable
    Explanation
    BNC connectors are commonly used in coaxial cable connections. Coaxial cables are widely used for transmitting audio, video, and data signals, making them suitable for various applications such as television, networking, and telecommunications. BNC connectors provide a secure and reliable connection between the coaxial cable and the device, ensuring efficient signal transmission. While BNC connectors can also be used in other types of cables, such as fiber optic and twisted pair cables, their primary and most common application is in coaxial cables.

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  • 13. 

    Step index and graded index are the types of propagation mode of twisted pair cable 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is false because step index and graded index are not types of propagation mode for twisted pair cable. Rather, they are types of optical fiber cables. Twisted pair cables use different modes of propagation, such as differential mode and common mode, to transmit signals.

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  • 14. 

    The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as

    • Modulation

    • Demodulation

    • Synchronizing

    • Digitising

    Correct Answer
    A. Digitising
    Explanation
    The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as digitising. This involves sampling the analog signal at regular intervals and quantizing the amplitude of each sample to a finite number of digital values. By converting the analog signal into a digital representation, it becomes easier to store, transmit, and manipulate the data using digital systems. Modulation refers to the process of encoding information onto a carrier signal, demodulation is the reverse process of extracting the original information from the modulated signal, and synchronizing involves coordinating different processes or devices to work together in a synchronized manner.

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  • 15. 

    Which of the following network topologies connects all devices in a closed loop?

    • Star topology

    • Bus topology 

    • Ring topology 

    • Mesh topology

    Correct Answer
    A. Ring topology 
    Explanation
    In a ring topology, each device is connected to two other devices, forming a continuous loop or ring. Data travels in one direction around the ring, passing through each device until it reaches its destination. This topology is relatively simple to implement but can be vulnerable to failure if a single device or connection malfunctions.  Sources and related content

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  • Oct 15, 2024
    Quiz Edited by
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  • May 16, 2022
    Quiz Created by
    Themes

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