Data Communications - Introduction

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Data Communications - Introduction - Quiz

This quiz covers the introduction of data communications and computer networking. Abbreviation is not allowed.


Questions and Answers
  • 1. 

    ________________________ represents an agreement between the communicating devices.

    Explanation
    It is also a set of rules that govern data communication.

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  • 2. 

    _____________________ defines the attachment of communication devices to a link.

    Explanation
    Line configuration refers to the arrangement or setup of communication devices connected to a link. It determines how the devices are connected, such as in a point-to-point or multipoint configuration. This configuration defines how data is transmitted and received between devices on the link, including the number of devices that can be connected and the direction of communication.

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  • 3. 

    ______________________ defines the physical or logical arrangement of links in the network.

    Explanation
    Topology refers to the arrangement or configuration of links in a network, whether it is physical or logical. It determines how the devices in a network are connected and how data flows between them. Different types of topologies, such as star, bus, ring, or mesh, can be used to design a network based on its requirements and objectives. The topology plays a crucial role in determining the network's performance, scalability, and fault tolerance.

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  • 4. 

    _________________________ establishes, manages and terminates sessions between applications.

    Explanation
    The session layer in a computer network establishes, manages, and terminates sessions between applications. It ensures that the communication between two applications is reliable and orderly, providing services such as session establishment, synchronization, and session termination. The session layer also handles error recovery and flow control, ensuring that data is transmitted accurately and efficiently. By managing the sessions between applications, the session layer enables the reliable exchange of data between them.

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  • 5. 

    _____________________ is a kind of transmission that transmits and receives information simultaneously.

    Explanation
    Full duplex is a type of transmission that allows for simultaneous transmission and reception of information. In full duplex communication, data can be sent and received at the same time, enabling real-time and uninterrupted communication. This is different from half duplex, where data can only be transmitted in one direction at a time. The term "full-duplex" is also used interchangeably with "full duplex" to refer to this type of transmission.

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  • 6. 

    __________________  is a convergence of  audio, video and data

    Explanation
    The correct answer is "data communications" and "data communication". These terms refer to the integration or convergence of audio, video, and data. It implies the transmission and reception of information in various forms, including voice, video, and digital data, through different communication channels. This convergence allows for more efficient and effective communication and sharing of information in modern technology and networks.

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  • 7. 

    _________________________ was formerly known as CCITT.

    Explanation
    The correct answer is ITU-T. The International Telecommunications Union-Telecommunication Standard Sector (ITU-T) was formerly known as CCITT. ITU-T is a specialized agency of the United Nations that focuses on developing and coordinating international telecommunications standards. It plays a crucial role in ensuring global interoperability and compatibility of telecommunication networks and services. The name change from CCITT to ITU-T reflects the organization's evolution and expanded scope in the field of telecommunications standards.

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  • 8. 

    __________________ is a collection of hardware and software components that allow communication between computers and other devices.

    Explanation
    A network is a collection of hardware and software components that allow communication between computers and other devices. It enables devices to share resources, such as files and printers, and facilitates communication through protocols and networking technologies. This allows for the exchange of data and information between connected devices, enabling collaboration, sharing, and access to shared resources. Networks can be wired or wireless and can be local (LAN) or wide area (WAN), depending on the geographic area they cover.

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  • 9. 

    _______________________ is  a software that manages the relationship between network resources and users.

    Explanation
    A Network Operating System is a software that manages the relationship between network resources and users. It provides functionalities such as file sharing, printer sharing, user authentication, and network security. It allows multiple users to access and share network resources efficiently. With a Network Operating System, administrators can control and manage the network, allocate resources, and ensure smooth communication between different devices and users on the network.

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  • 10. 

    ___________________ is a network that connects users across a city.

    Explanation
    A Metropolitan Area Network (MAN) is a network that connects users across a city. It is designed to cover a larger geographical area than a Local Area Network (LAN) but smaller than a Wide Area Network (WAN). A MAN typically uses high-speed connections such as fiber optic cables to provide fast and reliable communication between users within the city. It is commonly used by businesses, educational institutions, and government organizations to connect multiple locations and facilitate data sharing and communication.

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  • 11. 

    _________________ a network that provides connections between countries around the entire globe.

    Explanation
    A global area network refers to a network that connects countries across the entire world. It allows for communication and data transfer between different locations worldwide. This type of network is designed to provide connectivity on a global scale, enabling organizations and individuals to connect and exchange information regardless of their physical location.

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  • 12. 

    ________________________ is an OSI layer that establishes, maintains, and terminates virtual circuits.

    Explanation
    The correct answer is "transport" because the transport layer in the OSI model is responsible for establishing, maintaining, and terminating virtual circuits. This layer ensures reliable and error-free communication between the source and destination devices by providing services such as segmentation, reassembly, flow control, and error recovery. It also handles end-to-end delivery of data packets and ensures that they arrive in the correct order.

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  • 13. 

    ______________________ is the humorous name for the practice of copying files to a disk and walking the disk over to the person who needs the files.

    Explanation
    Sneaker net is the humorous name for the practice of physically copying files onto a disk and delivering it in person to the intended recipient. This term is often used to describe the process of transferring data offline, usually when there is no access to a network or when the transfer speed is faster than online alternatives. It is a playful way of highlighting the contrast between modern digital file sharing and the more traditional method of physically transporting information.

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  • 14. 

    ___________________ is an exchange of data between 2 devices via some form of transmission medium.

    Explanation
    Data communication refers to the process of exchanging data between two devices through a transmission medium. This can include various forms of communication such as sending and receiving information through cables, wireless networks, or other means. The plural form "data communications" can also be used to refer to this process. Both terms essentially describe the same concept of transmitting data between devices.

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  • 15. 

    _________________is a type of network setup where each of the computers and network devices are interconnected with one another, allowing for most transmissions to be distributed, even if one of the connections go down.

    Explanation
    Mesh topology is a type of network setup in which each computer and network device is interconnected with one another. This allows for most transmissions to be distributed, even if one of the connections goes down. In a mesh network, multiple paths are available for data transmission, ensuring high reliability and fault tolerance. This type of network is particularly useful in situations where uninterrupted communication is crucial, as it provides redundancy and eliminates single points of failure.

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  • 16. 

    A _______________is one of the most common network setups where each of the devices and computers on a network connect to a central hub.

    Explanation
    A star topology is a common network setup where each device and computer on a network connects to a central hub. In this setup, all communication between devices is routed through the central hub, which helps to manage and control the network. This type of topology allows for easy addition or removal of devices without disrupting the entire network.

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  • 17. 

    A _______________ is a type of network setup where each of the computers and network devices are connected to a single cable or backbone.

    Explanation
    A bus topology is a type of network setup where each of the computers and network devices are connected to a single cable or backbone. In this setup, all the devices share the same communication medium, which is the bus. Data is transmitted in both directions along the bus, and each device on the network receives the data and determines if it is intended for them. This type of network is simple and cost-effective to implement, but it can be prone to congestion and performance issues if there are too many devices connected to the bus.

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  • 18. 

    A _________________connects multiple star networks to other star networks.

    Explanation
    A tree or tree topology is a network architecture that connects multiple star networks to each other. In this type of network, one central node acts as the root and connects to multiple other nodes, which in turn can connect to additional nodes. This hierarchical structure allows for efficient communication and data flow between different star networks, making it an ideal solution for connecting multiple star networks together.

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  • 19. 

    _________________ is a network topology that uses two or more network

    Explanation
    A hybrid topology is a network topology that combines two or more different types of network topologies, such as star, bus, ring, or mesh. This allows for increased flexibility and scalability in the network design. By incorporating multiple topologies, the network can take advantage of the strengths of each topology, while minimizing their weaknesses. This can result in a more reliable and efficient network infrastructure.

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  • 20. 

    _____________________ is a computer network that spans a relatively small area within one building.

    Explanation
    A local area network (LAN) is a computer network that covers a small area, typically within a single building. It allows devices such as computers, printers, and servers to communicate and share resources within this confined space. LANs are commonly used in homes, schools, and office buildings to enable efficient and secure communication between devices in close proximity.

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  • 21. 

    ___________________ is a primary type of interconnecting networks that interconnects LANs within a building.

    Explanation
    A building backbone is a primary type of interconnecting network that connects LANs within a building. It serves as the main pathway for data transmission between different local area networks (LANs) within the same building. The building backbone ensures efficient and reliable communication between LANs, allowing for seamless connectivity and data exchange within the building infrastructure.

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  • 22. 

    Wide area network typically operates at bit rates from 1.5Mbps to _________ and cover a distance of 100 to 1000 miles.

  • 23. 

     A  ________ device typically stores files and databases including more complex applications like Web sites.

    Explanation
    A server is a device that typically stores files and databases, including more complex applications like websites. Servers are designed to handle and respond to requests from other devices, such as computers or mobile devices, on a network. They provide centralized storage and processing power, allowing multiple users to access and share resources. Servers are commonly used in business environments to host websites, manage email systems, store data, and run various applications.

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  • 24. 

    _____________________  provides services to clients such as log-in features, password authentication, printer access, network administration function, and data file sharing

    Explanation
    A network operating system is the correct answer because it is a type of operating system that provides various services to clients on a network. These services include log-in features, password authentication, printer access, network administration functions, and data file sharing. A network operating system is designed to manage and coordinate multiple computers and devices on a network, allowing them to communicate and share resources efficiently.

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  • 25. 

     _____________________ are very large computers that are built to be able to perform complex and critical applications.

    Explanation
    Mainframes are specifically designed to handle complex and critical applications. They are known for their large size and high processing power, making them capable of handling massive amounts of data and performing intricate calculations. Mainframes are often used in industries such as banking, healthcare, and government, where reliability, security, and scalability are of utmost importance. Their architecture allows for multiple users to access and process data simultaneously, making them ideal for handling large-scale operations.

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  • 26. 

     ____________________________ is an organization dedicated to worldwide agreement on internations standards in a variety of fields which was created in 1947 with 82 industrialized nations as representative bodies.

    Explanation
    The International Standards Organization (ISO) is an organization that was established in 1947 with the participation of 82 industrialized nations as representative bodies. Its primary objective is to promote worldwide agreement on international standards in various fields. The ISO plays a crucial role in facilitating global cooperation and ensuring consistency and compatibility in areas such as technology, manufacturing, and services.

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  • 27. 

     ________________________ is the largest professional group involved in developing standards for computing, communication, electrical and electronics engineering.

    Explanation
    The correct answer is "Institute of Electrical & Electronics Engineers" (IEEE). IEEE is the largest professional group involved in developing standards for computing, communication, electrical, and electronics engineering. They are renowned for their contributions to technology and innovation in various fields.

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  • 28. 

     _________________ line configuration involves only two locations or stations in transferring digital information, can be between a mainframe and a personal computer, two mainframe computers, two personal computers, or two data communications networks.

    Explanation
    The correct answer is "point-to-point" or "point to point" because this line configuration involves transferring digital information between only two locations or stations. It can be between a mainframe and a personal computer, two mainframe computers, two personal computers, or two data communications networks.

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  • 29. 

      ________________ line configuration involves 3 or more stations which generally used to interconnect a single mainframe computer (host) to many personal computers or to interconnect many personal computers.

    Explanation
    The correct answer is "Multipoint." In a multipoint line configuration, there are 3 or more stations that are used to interconnect a single mainframe computer (host) to many personal computers or to interconnect many personal computers. This configuration allows for multiple devices to be connected to a single host, facilitating communication and data sharing between the mainframe and the personal computers.

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  • 30. 

     _______________  architecture facilitates peer-to-peer communications protocols where a given layer in one system can logically communicate with its corresponding layer in another system.

    Explanation
    Layered architecture is a design approach that organizes a system into multiple layers, each responsible for a specific set of functionalities. In this architecture, each layer communicates with its corresponding layer in another system, allowing for peer-to-peer communication protocols. This means that the layers can interact and exchange information in a logical and structured manner, enhancing interoperability and modularity in the system.

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  • 31. 

     Information that has been processed, organized, and stored is called ______________ .

    • A.

      Data.

    • B.

      Binary-coded numbers

    • C.

      Telecommunications systems

    • D.

      networking

    Correct Answer
    A. Data.
    Explanation
    When information is processed, organized, and stored, it is referred to as data. Data can be in various forms such as text, numbers, images, or videos. It is the raw material that is used to generate meaningful insights and knowledge through analysis and interpretation. Data is crucial in decision-making, problem-solving, and understanding trends and patterns.

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  • 32. 

     The size of most local area networks is ________________.

    • A.

      Very big

    • B.

      Limited

    • C.

      Moderate

    • D.

      Covered with only 10 computers

    Correct Answer
    B. Limited
    Explanation
    Local area networks (LANs) are designed to connect devices within a limited geographical area, such as a home, office, or campus. They typically have a limited size in terms of the number of devices that can be connected to them. Therefore, the correct answer is "limited" because the size of most local area networks is restricted and not very big or covered with only a specific number of computers.

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  • 33. 

    It interconnects many networks or all types of networks.

    • A.

      Campus backbone

    • B.

      Building backbone

    • C.

      Enterprise network

    • D.

      Metropolitan area network

    Correct Answer
    C. Enterprise network
    Explanation
    An enterprise network is the correct answer because it is a network that interconnects many networks or all types of networks within a single organization or enterprise. It serves as the backbone of the organization's communication infrastructure, allowing different networks and devices to communicate and share resources seamlessly. This type of network is typically used by large businesses or organizations to facilitate efficient and secure communication and data transfer across various locations and departments.

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  • 34. 

     It interconnects building LANs and is designed to have a group of buildings, at a single location, such as corporate headquarters, universities, airports, and research parks.

    • A.

      Building backbone

    • B.

      Enterprise network

    • C.

      Metropolitan area network

    • D.

      Campus backbone

    Correct Answer
    D. Campus backbone
    Explanation
    A campus backbone is a network that connects building LANs within a single location, such as corporate headquarters, universities, airports, and research parks. It is designed to provide high-speed and reliable connectivity between different buildings in the campus. This network infrastructure allows for efficient communication and data transfer between various departments and users within the campus.

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  • 35. 

      This could be a single network, such as a cable television distribution network, enabling data resources to be shared LAN to LAN as well as from station to station or computer to computer.

    • A.

      Local area network

    • B.

      Metropolitan area network

    • C.

      Wide area network

    • D.

      Global area network

    Correct Answer
    B. Metropolitan area network
  • 36. 

    These are the oldest type of data communications network that provide relatively slow-speed, long-distance transmission of data, voice, and video information over relatively large and widely dispersed geographical areas.

    • A.

      Local area network

    • B.

      Metropolitan area network

    • C.

      Wide area network

    • D.

      Global area network

    Correct Answer
    C. Wide area network
    Explanation
    A wide area network (WAN) is the correct answer because it is the oldest type of data communications network that allows for slow-speed, long-distance transmission of data, voice, and video information over large geographical areas. WANs are designed to connect multiple local area networks (LANs) and metropolitan area networks (MANs) together, enabling communication between different locations that are widely dispersed.

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  • 37. 

     It is generic term that simply means to interconnect 2 or more networks.

    • A.

      Internetwork

    • B.

      Internet

    • C.

      Local area network

    • D.

      Global area network

    Correct Answer
    A. Internetwork
    Explanation
    Internetwork is a generic term used to describe the process of connecting two or more networks together. It refers to the concept of creating a larger network by linking multiple smaller networks. This can be done through various methods such as routers, switches, and gateways. The term internetwork is often used to describe the internet itself, as it is a vast interconnection of networks worldwide. It can also refer to other types of interconnected networks, such as local area networks (LANs) and global area networks (GANs).

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  • 38. 

      -Its advantages are reduced traffic problems, increased reliability, and enhanced security

    • A.

      Ring topology

    • B.

      Star topology

    • C.

      Mesh topology

    • D.

      Bus topology

    Correct Answer
    C. Mesh topology
    Explanation
    Mesh topology is the correct answer because it offers several advantages including reduced traffic problems, increased reliability, and enhanced security. In a mesh topology, every node is connected to every other node, forming a network with multiple redundant paths. This redundancy ensures that if one connection fails, there are alternative paths for data transmission, reducing traffic problems and increasing reliability. Additionally, the multiple connections in a mesh topology enhance security as it is difficult for unauthorized users to intercept or manipulate data.

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  • 39. 

    With this topology, remote stations cannot communicate directly with one another, so they relay information through the hub.

    • A.

      Mesh topology

    • B.

      Star topology

    • C.

      Hybrid topology

    • D.

      Bus topology

    Correct Answer
    B. Star topology
    Explanation
    In a star topology, all devices are connected to a central hub, which acts as a central point for communication. Each device communicates directly with the hub, but not with each other. This means that remote stations in this topology cannot communicate directly with one another and instead rely on the hub to relay information. Therefore, the given explanation aligns with the characteristics of a star topology.

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  • 40. 

     It is the simplest and most common method of interconnecting computers.

    • A.

      Star topology

    • B.

      Hybrid topology

    • C.

      Mesh topology

    • D.

      Bus topology

    Correct Answer
    D. Bus topology
    Explanation
    Bus topology is the simplest and most common method of interconnecting computers. In this topology, all computers are connected to a single cable called a bus. The bus acts as a communication medium, and data is transmitted from one computer to another by broadcasting it onto the bus. This type of topology is easy to implement and requires less cabling compared to other topologies. However, a single point of failure can disrupt the entire network, as the failure of the bus cable can bring down the entire network.

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  • 41. 

     Transmissions are unidirectional and must propagate through all the stations in the loop

    • A.

      Ring topology

    • B.

      Mesh topology

    • C.

      Bus topology

    • D.

      Star topology

    Correct Answer
    A. Ring topology
    Explanation
    In a ring topology, the transmissions are unidirectional, meaning they travel in only one direction through all the stations in the loop. This is because each station is connected to exactly two neighboring stations, forming a closed loop. The data packets or signals pass through each station in the loop until they reach their destination. This ensures that the information flows consistently and efficiently throughout the network.

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  • 42. 

     Each station is joined by point-to-point links to two other stations (the transmitter of one and the receiver of the other)

    • A.

      Bus topology

    • B.

      Mesh topology

    • C.

      Ring topology

    • D.

      Star topology

    Correct Answer
    C. Ring topology
    Explanation
    In a ring topology, each station is connected to two other stations, forming a closed loop. This means that data travels in one direction around the ring, passing through each station until it reaches its destination. This topology is known for its fault tolerance, as if one station or link fails, the data can still be transmitted by going in the opposite direction. It also provides equal access to all stations and does not require a central hub, making it suitable for small networks.

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  • 43. 

     Transmissions are possible in both directions simultaneously, but not between the same two stations.

    • A.

      Simplex transmission

    • B.

      Half-duplex transmission

    • C.

      Full-duplex transmission

    • D.

      Full/full-duplex transmission

    Correct Answer
    D. Full/full-duplex transmission
    Explanation
    In a full/full-duplex transmission, both stations can transmit and receive data simultaneously. This means that they can send and receive information at the same time without any interruptions or delays. However, this type of transmission is not possible between the same two stations. This means that if Station A is sending data to Station B, Station B cannot simultaneously send data back to Station A. The communication can only occur between two different stations.

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  • 44. 

     Transmissions are possible in both directions simultaneously, but they must be between the same two stations.

    • A.

      Simplex transmission

    • B.

      Half-duplex transmission

    • C.

      Full-duplex transmission

    • D.

      Full/full-duplex transmission

    Correct Answer
    C. Full-duplex transmission
    Explanation
    Full-duplex transmission refers to the ability to transmit data in both directions simultaneously. This means that two stations can send and receive data at the same time. However, it is important to note that this transmission can only occur between the same two stations.

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  • 45. 

     It is typically privately owned data communications networks in which 10 to 100 computer users typically share data resources with one or more file servers.

    • A.

      Local area network

    • B.

      Metropolitan area network

    • C.

      Wide area network

    • D.

      Global area network

    Correct Answer
    A. Local area network
    Explanation
    A local area network (LAN) is a privately owned data communications network that typically serves a small geographical area, such as an office building or a campus. In a LAN, 10 to 100 computer users can share data resources with one or more file servers. LANs are designed to provide fast and reliable communication within a limited area, allowing users to easily access shared files and resources.

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  • 46. 

     It can be a simple 2 personal computers and a printer or could contain dozens of computers, workstations, and peripheral devices.

    • A.

      Local area network

    • B.

      Metropolitan area network

    • C.

      Wide area network

    • D.

      Global area network

    Correct Answer
    A. Local area network
    Explanation
    A local area network (LAN) is a network that connects computers and other devices within a limited geographical area, such as a home, office, or building. It can be as simple as two personal computers and a printer or can include multiple computers, workstations, and peripheral devices. LANs are commonly used in small-scale settings to facilitate communication and resource sharing between devices in close proximity to each other.

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  • 47. 

     It determines whether data are intended for the user’s computer or whether the data need to be redirected out onto the network

    • A.

      Data communicationa

    • B.

      Network operating system

    • C.

      Client

    • D.

      Server

    Correct Answer
    B. Network operating system
    Explanation
    A network operating system is responsible for managing and coordinating the activities of all the computers and devices within a network. It determines whether data are intended for the user's computer or whether the data need to be redirected out onto the network. This means that the network operating system plays a crucial role in facilitating data communication within the network by ensuring that data is correctly routed to the appropriate destination.

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  • 48. 

    It generates data and could be a mainframe computer, personal computer, workstation, or virtually any other piece of digital equipment.

    • A.

      Sender

    • B.

      Receiver

    • C.

      Transmission medium

    • D.

      Protocol

    Correct Answer
    A. Sender
    Explanation
    The given correct answer is "sender". In the context of the question, a sender refers to a device or piece of digital equipment that generates data. This can include various types of computers such as mainframe computers, personal computers, workstations, or any other digital equipment capable of generating data. The sender is responsible for initiating the transmission of data to a receiver through a transmission medium, following a specific protocol.

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  • 49. 

    These are computers that request and receive services from the servers.

    • A.

      Transmission medium

    • B.

      Client

    • C.

      Protocol

    • D.

      Telephone

    Correct Answer
    B. Client
    Explanation
    A client is a computer that requests and receives services from servers. Clients are responsible for sending requests to servers and receiving responses in return. They can be desktop computers, laptops, smartphones, or any other device that connects to a network and interacts with servers. Clients play a crucial role in the client-server model, where servers provide services or resources to clients upon request.

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  • 50. 

    It is a network connection that normally carries traffic between departmental LANs within a single company.

    • A.

      Building backbone

    • B.

      Campus backbone

    • C.

      Enterprise network

    Correct Answer
    A. Building backbone
    Explanation
    A building backbone refers to a network connection that is responsible for carrying traffic between departmental LANs within a single company. It serves as a central connection point within a building, allowing different departments to communicate and share resources efficiently. This type of network infrastructure is specifically designed to support the internal communication needs of a company within a physical building or site.

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