Introduction to Computer Networks
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Questions and Answers

What is the purpose of having a computer network?

To send and receive data stored in other devices over the network.

What are the two ways to establish a network connection?

  • Bluetooth and Wi-Fi
  • Cable and Wireless (correct)
  • LAN and WAN
  • Modem and Router
  • A computer network can only be used for sharing files.

    False

    What is the advantage of electronic communication over traditional methods?

    <p>Electronic communication is more efficient and less expensive.</p> Signup and view all the answers

    What are the five basic components of a computer network?

    <p>Protocol, Rules, Sender, Message, Receiver</p> Signup and view all the answers

    What is the role of a Protocol in a computer network?

    <p>A protocol is a set of rules that are agreed by both sender and receiver, enabling communication between devices.</p> Signup and view all the answers

    What is the role of a Switch in a computer network?

    <p>Switches connect computers, printers, and other hardware devices to a network within a building or campus.</p> Signup and view all the answers

    What are some examples of Transmission Media?

    <p>Wires, cables, radio waves, coaxial cable, twisted-pair wire, optical fiber cable.</p> Signup and view all the answers

    What is the role of Access Points in a computer network?

    <p>Access Points allow devices to connect to the wireless network without cables.</p> Signup and view all the answers

    What are examples of Shared Data?

    <p>Data files, printer access programs, and email.</p> Signup and view all the answers

    What is the role of a Network Interface Card?

    <p>The Network Interface Card sends, receives data, and controls data flow between the computer and the network.</p> Signup and view all the answers

    What is the role of a Local Operating System?

    <p>A local operating system helps personal computers access files, print to a local printer, and use local disk drives.</p> Signup and view all the answers

    What is the role of a Network Operating System?

    <p>The Network Operating System allows computers to communicate via network, enabling data exchange and resource sharing between different systems.</p> Signup and view all the answers

    What is the role of a Hub in a computer network?

    <p>A hub splits network connection into multiple computers, acting as a distribution center for data requests within a network.</p> Signup and view all the answers

    What is a LAN cable also known as?

    <p>Ethernet or data cable.</p> Signup and view all the answers

    What does OSI stand for?

    <p>Open Systems Interconnection.</p> Signup and view all the answers

    What is the primary function of a computer network in terms of performance?

    <p>To minimize the response time of sending and receiving data from one node to another.</p> Signup and view all the answers

    What is the primary reason for using a computer network?

    <p>To share data between different systems connected with each other through a transmission media.</p> Signup and view all the answers

    What is the role of a central server in a computer network in relation to backup?

    <p>To keep a backup of all the data that is to be shared over a network so that in case of a failure, the data can be recovered.</p> Signup and view all the answers

    What is the key characteristic of a reliable computer network?

    <p>A network should not be prone to failures, or if failure occurs, the recovery process should be fast.</p> Signup and view all the answers

    What is the primary concern in relation to security in a computer network?

    <p>To protect data from unauthorized access as it is transmitted across the network, ensuring data integrity and confidentiality.</p> Signup and view all the answers

    Explain the concept of scalability in a computer network.

    <p>Scalability refers to the ability of a network to accommodate the addition of new computers or nodes without compromising performance.</p> Signup and view all the answers

    What is the primary consideration in relation to Software and Hardware compatibility in a computer network?

    <p>To allow different software and hardware to work together effectively, allowing for flexibility and diverse system configurations.</p> Signup and view all the answers

    What is the purpose of a Computer Network Architecture?

    <p>To define how computers should be connected within a network in order to optimize network performance, security, and efficiency.</p> Signup and view all the answers

    What are two popular Computer Network Architectures?

    <p>Peer-to-Peer (P2P) and Client-Server</p> Signup and view all the answers

    What is the key characteristic of a Peer-to-Peer (P2P) network?

    <p>All computers in the network are connected with every other computer and have access to the same resources.</p> Signup and view all the answers

    What is the advantage of a Peer-to-Peer (P2P) network?

    <p>Reduced cost due to the absence of a central server.</p> Signup and view all the answers

    What is the role of a central computer in a Client-Server network?

    <p>To serve as a hub, managing requests from client computers and providing shared data.</p> Signup and view all the answers

    What is the advantage of a Client-Server network?

    <p>Increased security due to centralized control and improved performance through dedicated server resources.</p> Signup and view all the answers

    What is a Network Topology?

    <p>The arrangement of computers or network devices within a network, defining their physical and logical connections.</p> Signup and view all the answers

    Describe a Point-to-Point network.

    <p>A network with direct connections between two devices using a single piece of cable.</p> Signup and view all the answers

    Describe a Bus Topology.

    <p>A network where all devices share a single communication line or cable.</p> Signup and view all the answers

    What is the OSI Model?

    <p>A standard model for communication systems that divides the communication process into seven layers, each with a specific function.</p> Signup and view all the answers

    What is the primary role of the Application Layer in the OSI Model?

    <p>To provide an interface for application users to interact with the network.</p> Signup and view all the answers

    What is the primary role of the Presentation Layer in the OSI Model?

    <p>To handle data formatting and representation, ensuring compatibility between different systems.</p> Signup and view all the answers

    What is the primary role of the Session Layer in the OSI Model?

    <p>To manage communication sessions between different systems, ensuring seamless data exchange.</p> Signup and view all the answers

    What is the primary role of the Transport Layer in the OSI Model?

    <p>To ensure reliable and efficient data delivery between systems, handling data segmentation and error control.</p> Signup and view all the answers

    What is the primary role of the Network Layer in the OSI Model?

    <p>To manage network addresses and route data packets between different networks, ensuring efficient data flow.</p> Signup and view all the answers

    What is the primary role of the Data Link Layer in the OSI Model?

    <p>To handle data transmission between physical devices, addressing error detection and correction.</p> Signup and view all the answers

    What is the primary role of the Physical Layer in the OSI Model?

    <p>To define the physical characteristics of the network, including cabling, connectors, and signaling mechanisms.</p> Signup and view all the answers

    What is the primary function of the TCP/IP model?

    <p>To enable communication between computers on the internet, addressing a wide range of services and protocols.</p> Signup and view all the answers

    What are the four layers of the TCP/IP model?

    <p>Application Layer, Transport Layer, Internet Layer, Link Layer.</p> Signup and view all the answers

    What does an Internet Service Provider (ISP) do?

    <p>An ISP provides access to the internet, offering services such as internet access, domain name registration, and dial-up or leased line access.</p> Signup and view all the answers

    What is the role of an Intranet?

    <p>A private network within an organization, enabling secure communication and data sharing among its members.</p> Signup and view all the answers

    What are the benefits of using an Intranet?

    <p>Improved collaboration, cost-effectiveness, security, productivity, and business management.</p> Signup and view all the answers

    What is a VSAT?

    <p>A two-way, ground-based micro station that transmits data to and from communication satellites, typically using a small antenna.</p> Signup and view all the answers

    What are the advantages of VSATs ?

    <p>They offer wide coverage due to satellite communication, providing connectivity in remote locations.</p> Signup and view all the answers

    What are different types of networks based on geographic scope?

    <p>PAN (Personal Area Network), LAN (Local Area Network), MAN (Metropolitan Area Network), WAN (Wide Area Network).</p> Signup and view all the answers

    Describe a PAN (Personal Area Network).

    <p>A network that connects devices within a small personal space, typically within 10 meters, using technologies like Bluetooth or Wi-Fi.</p> Signup and view all the answers

    Describe a LAN (Local Area Network).

    <p>A network that connects devices within a single location, such as an office building or home, using wired or wireless technologies.</p> Signup and view all the answers

    Describe a MAN (Metropolitan Area Network).

    <p>A network that connects devices within a larger geographical area, such as a city or town, and typically covers several kilometers.</p> Signup and view all the answers

    Describe a WAN (Wide Area Network).

    <p>A network that covers a large geographical area, spanning entire countries or even continents, connecting multiple LANS, MANs, and other WANs.</p> Signup and view all the answers

    Study Notes

    Introduction to Computer Network

    • A computer network is a group of interconnected devices, using transmission mediums like wires or cables.
    • The purpose of a computer network is to share data between devices.
    • Computer networks consist of two or more interconnected computer systems.
    • A network connection can be established using either cables or wireless media.

    Advantages of a Computer Network

    • Connects multiple computers for sharing information.
    • Enables sharing of resources like printers, scanners, and emails.
    • Allows for faster information sharing.
    • Offers electronic communication, which is often more efficient and less expensive than traditional methods.

    Basic Components of a Computer Network

    • Protocol: A set of rules governing communication between devices.
    • Sender: Device originating the data.
    • Receiver: Device receiving the data.
    • Message: Data being transferred.
    • Transmission Media: The pathway for data transfer (e.g., cables, radio waves).

    Transmission Media

    • Physical paths for data transmission between devices.
    • Examples include: wires, cables, radio waves.

    Protocols

    • Protocols are sets of rules that govern how devices communicate.
    • Without protocols, devices can't communicate reliably.
    • Protocols ensure reliable data communication between devices.

    Switches

    • Connect devices within a network (e.g., computers, printers).
    • Act as controllers in a campus or building network.

    Routers

    • Connect multiple networks.
    • Allow for efficient data sharing.
    • Act as dispatchers to find the best routes for data transmission.

    Servers

    • Computers storing shared files and programs for network users.
    • Provide access to network resources.

    Transmission Media

    • Various types exist, including coaxial cables, twisted-pair wires, and fiber optic cables.

    Access points

    • Allow wireless device connections to a network.
    • Provide flexible connectivity and easier connection to mobile users.

    Shared data

    • Data shared among clients (e.g., files, printer access, programs, emails).

    Network Interface Card (NIC)

    • Card that allows a computer to communicate with the network.
    • Sends, receives, and controls data flow between the computer and the network.

    Local Operating System (OS)

    • Software a personal computer uses to access local files, printers, and CD/DVD drives.

    Network Operating System (NOS)

    • Software for computers and servers that allows communication.
    • Enables communication between computers on a network.

    Hubs

    • Network devices in data transmission.
    • Act as a central connection point for other devices.
    • Transmit data to all attached devices.

    LAN Cables

    • Ethernet or data cables used to connect devices to a local area network (LAN).

    OSI Model

    • Open Systems Interconnection model.
    • Allows for the standardization of communication protocols.

    Network Topology

    • Physical or logical arrangement of devices in a network.
      • Bus Topology: All devices share a single communication line, potential single point of failure.
      • Star Topology: Devices connected to a central hub using point-to-point connections.
      • Ring Topology: Devices form a closed loop, with each device connected to two others.
      • Mesh Topology: Devices are connected directly to each other, often in a complex configuration.
      • Tree Topology: A hierarchical structure of interconnected devices and logical network layers.
      • Hybrid Topology: Combines different topologies, creating a combined network structure.

    Peer-to-Peer Architecture

    • All computers in the network are connected, with each computer sharing resources.
    • Every computer acts as a client and a server.

    Client-Server Architecture

    • Central server manages data and resources.
    • Client computers request services from the server.
    • Efficient for large networks.

    Internet Service Providers (ISPs)

    • Companies providing internet access.
    • Offer various services like internet access, domain name registration, dial-up access, and leased lines.

    VSAT (Very Small Aperture Terminal)

    • Microwaves transmitted between ground stations and satellites.
    • Often used for remote areas lacking wired infrastructure.

    Types of Networks

    • Personal Area Network (PAN): Connects devices within a personal space, like smartphones and computers.
    • Local Area Network (LAN): Connects devices within a limited area, like a home or office.
    • Metropolitan Area Network (MAN): Spans a metropolitan area (city or a region)
    • Wide Area Network (WAN): Connects devices across large geographical areas.

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    Related Documents

    UNIT 1 Net & Int. PDF

    Description

    This quiz covers the fundamentals of computer networks, including their definition, advantages, and basic components. Understand how devices connect, the significance of protocols, and the benefits of data sharing in a networked environment.

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