Data Communication and Computer Networks
36 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the five components of data communication?

  • Message, Sender, Receiver, Transmission Medium, Protocol (correct)
  • Message, Sender, Receiver, Transmission Medium, Network
  • Message, Sender, Receiver, Network, Protocol
  • Data, Sender, Receiver, Transmission Medium, Protocol

    • What is a network?

    A set of devices connected by communication links.

    What are some uses of computer networks in business?

  • Monitor Production, Keep inventory, do the payroll, Resource Sharing, Data Transfer
  • Email, Video Conferencing, Webinars
  • Monitor Production, Keep inventory, do the payroll, Resource Sharing, Proximities between Headquarter and Area Offices (correct)
  • E-Commerce, Online Games, Video On Demand

    • What is the client-server model?

    <p>A network where a server provides resources to client computers.</p> Signup and view all the answers

    What network devices connect different networks and determine the best path for data packets?

    <p>Router</p> Signup and view all the answers

    Switches are less efficient than hubs.

    <p>False</p> Signup and view all the answers

    A modem converts __________ signals to __________ signals.

    <p>digital; analog</p> Signup and view all the answers

    What is a gateway?

    <p>A networking device or software that acts as a bridge between two networks with different protocols.</p> Signup and view all the answers

    What are the three main categories of network topology?

    <p>Mesh, Star, Ring</p> Signup and view all the answers

    What are some advantages of a mesh network?

    <p>Robustness, Privacy &amp; Security, Easy fault identification and isolation.</p> Signup and view all the answers

    A bus network is cheaper than a mesh network but less robust.

    <p>True</p> Signup and view all the answers

    A ______ network uses a central hub to connect all devices and is typically less expensive and easier to install than a mesh network.

    <p>star</p> Signup and view all the answers

    What network devices are used to connect multiple devices within a local area network?

    <p>Switches</p> Signup and view all the answers

    A ring network is suitable for applications that require high bandwidth and real-time data transmission.

    <p>False</p> Signup and view all the answers

    What are the two main categories of networks?

    <p>LAN and WAN</p> Signup and view all the answers

    What are some examples of LANs?

    <p>Home Area Network (HAN), Storage Area Network (SAN), Campus/Corporate Area Network (CAN)</p> Signup and view all the answers

    What types of cables are commonly used in LANs?

    <p>All of the above</p> Signup and view all the answers

    What is a MAN?

    <p>A network that connects multiple computers within a metropolitan area.</p> Signup and view all the answers

    What is a protocol?

    <p>A set of rules that defines how data is communicated</p> Signup and view all the answers

    What are the three key elements of a protocol?

    <p>Syntax, Semantics, Timing</p> Signup and view all the answers

    What is the purpose of the OSI model?

    <p>To provide a framework for designing and developing network systems</p> Signup and view all the answers

    The OSI model is still widely used in modern networking.

    <p>False</p> Signup and view all the answers

    What are the layers of the OSI model?

    <p>Application, Presentation, Session, Transport, Network, Data Link, Physical</p> Signup and view all the answers

    Which layer of the OSI model is responsible for the physical transmission of data?

    <p>Physical Layer</p> Signup and view all the answers

    Which layer of the OSI model is responsible for error control and addressing data frames?

    <p>Data Link Layer</p> Signup and view all the answers

    Which layer of the OSI model is responsible for logical addressing and routing packets?

    <p>Network Layer</p> Signup and view all the answers

    The Transport Layer of the OSI model is responsible for providing end-to-end flow control?

    <p>True</p> Signup and view all the answers

    Which layer of the OSI model is responsible for establishing and managing communication sessions between applications?

    <p>Session Layer</p> Signup and view all the answers

    Which layer of the OSI model translates data formats and handles encryption?

    <p>Presentation Layer</p> Signup and view all the answers

    Which layer of the OSI model is responsible for providing user-level services to applications, such as email, file transfer, and web browsing?

    <p>Application Layer</p> Signup and view all the answers

    The TCP/IP model is more widely used than the OSI model.

    <p>True</p> Signup and view all the answers

    Which layer of the TCP/IP model is responsible for providing end-to-end connection-oriented communication and reliable data delivery?

    <p>Transport Layer</p> Signup and view all the answers

    Which layer of the TCP/IP model includes protocols such as TCP and UDP?

    <p>Transport Layer</p> Signup and view all the answers

    Which layer of the TCP/IP model is responsible for providing services to applications, such as email, file transfer, and web browsing?

    <p>Application Layer</p> Signup and view all the answers

    What is the purpose of the SMTP protocol?

    <p>Sending and receiving email messages over a network.</p> Signup and view all the answers

    What is the purpose of the TELNET protocol?

    <p>Establishing a command-line session on a remote host.</p> Signup and view all the answers

    Study Notes

    Data Communication

    • Communication is the process of exchanging information
    • Telecommunication means communication at distance (e.g., telephony, telegraphy, television)
    • Data is information presented in agreed-upon form by creators and users
    • Data communication is the exchange of data between devices via a transmission medium
    • Effectiveness of data communication depends on delivery, accuracy, timeliness, and jitter (variations in packet arrival time)

    Computer Networks

    • A network is a set of devices (nodes) connected by communication links
    • A node can be a computer, printer, or other devices capable of sending/receiving data
    • Network uses include business applications (monitoring production, inventory, payroll), resource sharing, and proximities between headquarters and area offices

    Network Hardware

    • Router: connects networks, determines best path for data packets, is an intermediary device handling data traffic between local network (LAN) and the internet (WAN)
    • Switch: creates local area network (LAN) connecting multiple devices (computers, printers, servers) working at data link layer of OSI model using MAC (media access control) addresses to forward data packets within the network
    • Hub: older, simpler networking device that connects devices to a central connection point, broadcasts data to all connected devices, leading to collisions in hub-based networks
    • Modem: converts digital signals to analog for communication over analog lines (e.g., telephone, cable), converts analog signals back into digital signals for computers/devices
    • Gateway: networking device or software acting as an entry/exit point between networks with different protocols

    Network Software

    • Computer networks communicate between entities
    • Protocol is a set of rules governing data communication
    • Protocol defines what is communicated, how it is communicated, and when it is communicated
    • Key protocol elements include syntax (structure/format of data), semantics (meaning of each bit section), and timing (when data should be sent and how fast)
    • Standards are essential for open, competitive markets and interoperability

    Network Types

    • Local Area Network (LAN): privately owned network within an office, building, or campus, sharing resources like printers, scanners, hard drives, etc
    • Wide Area Network (WAN): large networks spanning countries or continents, connecting multiple LANs through routers and gateways
    • Metropolitan Area Network (MAN): network between LAN and WAN in size, covering cities or towns within a few hundred kilometers, typically using long-distance optic cabling

    Internet Protocols

    • TCP/IP Model has four/five layers, includes TCP, UDP, SCTP. Some protocols are SMTP, FTP, HTTP, DNS and SNMP

    OSI Reference Model

    • The seven layer OSI (Open Systems Interconnection) model defines tasks in the network
    • Each layer corresponds to a part of the network operation
    • Layers connect from one device to another across the network
    • Key layers include: application, presentation, session, transport, network, data link, and physical layers

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Ch-2 Data Communication PDF

    Description

    This quiz covers the essentials of data communication, highlighting the principles of exchanging information, the role of telecommunication, and the functioning of computer networks. Additionally, it discusses key network hardware components like routers and their significance in managing data traffic. Test your knowledge on these critical concepts in networking technology!

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser