Chapter 8
39 Questions
2 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 is the primary benefit of increased connectivity in society?

  • Increased productivity in business (correct)
  • Reduced reliance on technology
  • Greater isolation among individuals
  • Decreased productivity in business
  • Which type of network is specifically designed for a small geographic area, like a home or office?

  • Local area network (correct)
  • Personal area network
  • Metropolitan area network
  • Wide area network
  • What is a key distinguishing feature of cellular communication compared to dial-up and DSL?

  • Uses physical wires for data transmission
  • Requires a home telephone line
  • Provides internet via satellite connection
  • Operates wirelessly (correct)
  • Which factor is considered critical for data transmission within networks?

    <p>Bandwidth and protocols</p> Signup and view all the answers

    What type of communication channel does not use physical connections, typically relying on airwaves?

    <p>Wireless channel</p> Signup and view all the answers

    What is the primary function of a firewall in network security?

    <p>To control access to the network</p> Signup and view all the answers

    Which of the following statements accurately describes an intranet?

    <p>A private network within a single organization</p> Signup and view all the answers

    How does a Virtual Private Network (VPN) enhance network security?

    <p>By creating a secure connection between a user and the organization</p> Signup and view all the answers

    In a Peer-to-Peer (P2P) network, what is true about the authority of the nodes?

    <p>All nodes have equal authority</p> Signup and view all the answers

    What is the role of a Network Administrator?

    <p>To manage a company’s LAN and WAN networks</p> Signup and view all the answers

    What is a key requirement for candidates seeking positions in networking hardware and software?

    <p>Bachelor’s or associate’s degree in relevant fields</p> Signup and view all the answers

    Which of the following best describes telepresence technology?

    <p>Creating the illusion of being at a remote location using robotics</p> Signup and view all the answers

    What is typically preferred for candidates in network roles?

    <p>Certification in network security</p> Signup and view all the answers

    What is one potential advantage of telepresence technology?

    <p>It allows physical interaction with objects in remote locations</p> Signup and view all the answers

    Which of these network types is focused on small geographical areas, like a single building?

    <p>Local area network</p> Signup and view all the answers

    The annual salary for networking professionals typically ranges between which amounts?

    <p>$43 K - $84 K</p> Signup and view all the answers

    Which of the following describes a network topology where each node is connected to a central hub?

    <p>Star topology</p> Signup and view all the answers

    Which protocol is concerned with the process of converting a human-readable domain name into an IP address?

    <p>Domain Name System (DNS)</p> Signup and view all the answers

    What is the maximum data rate of Wi-Fi 5?

    <p>7.2 Gbps</p> Signup and view all the answers

    Which type of cable has a higher transmission capacity than twisted pair cables?

    <p>Coaxial cable</p> Signup and view all the answers

    What is the primary function of a modem?

    <p>Converts digital signals to analog and vice versa</p> Signup and view all the answers

    What frequency does Wi-Fi 6E utilize?

    <p>1-6 GHz</p> Signup and view all the answers

    Which technology is used to determine the geographic location of devices?

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

    What is the main advantage of fiber-optic cables over coaxial cables?

    <p>Higher capacity for data transmission</p> Signup and view all the answers

    Which of the following is not a type of physical connection medium?

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

    What is the unique identifier for each computer on a TCP/IP network?

    <p>IP Address</p> Signup and view all the answers

    Which of the following is an example of a wireless technology?

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

    What is the purpose of packetization in data transmission?

    <p>Break data into small parts for efficient transfer</p> Signup and view all the answers

    Which connection service is known for using multiple antennae for communication?

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

    Which of the following describes a client in a client/server network?

    <p>Requests services from the server</p> Signup and view all the answers

    What is the main characteristic of broadband connections?

    <p>High-speed internet access</p> Signup and view all the answers

    What are the basic elements of communication systems?

    <p>Sending and receiving devices, connection devices, data transmission specifications, communication channel</p> Signup and view all the answers

    Which of the following is NOT an application that depends on communication systems?

    <p>Graphic design software</p> Signup and view all the answers

    What significant change in connectivity has occurred in the past decade?

    <p>The Wireless Revolution</p> Signup and view all the answers

    What materials do wireless connections utilize for communication?

    <p>The air itself</p> Signup and view all the answers

    Which component acts as the interface between sending and receiving devices in a communication system?

    <p>Connection devices</p> Signup and view all the answers

    In a communication system, which of the following describes the rules and procedures that coordinate the devices?

    <p>Data transmission specifications</p> Signup and view all the answers

    What is the primary function of communication channels?

    <p>To carry the message</p> Signup and view all the answers

    Which of the following best describes computer communications?

    <p>The exchange of data between two or more devices</p> Signup and view all the answers

    Study Notes

    Learning Objectives

    • Explain connectivity, the wireless revolution, and communication systems
    • Describe physical and wireless communications channels
    • Differentiate between connection devices and services
    • Describe data transmission factors, including bandwidth and protocols
    • Define networks and key network terminology
    • Describe different types of networks
    • Describe network architectures, including topologies and strategies
    • Explain organization issues related to Internet technologies and network security

    Introduction

    • We live in a truly connected society
    • Increased connectivity potentially means increased productivity, especially in business
    • Students will learn about connectivity and the impact of the wireless revolution

    Communication

    • Computer communications is the process of sharing data, programs, and information between two or more computers
    • Numerous applications depend on communication systems, including texting, email, videoconferencing, and electronic commerce

    Connectivity

    • Connectivity uses computer networks to link people and resources
    • Connects personal computers to other computers and resources on a network and the Internet
    • Wireless revolution is the single most dramatic change in connectivity in the past decade
    • Allows individuals to connect to the Internet and share information from almost anywhere in the world

    Communication Systems

    • Communication systems are electronic systems that transmit data from one location to another
    • Wired or wireless, every communication system has four basic elements: sending device, message, connection device, communication channel, connection device, message, receiving device, and packets

    Basic Elements of Communication

    • Sending and receiving devices (computer or specialized communication device)
    • Connection devices (interface between sending and receiving device)
    • Data transmission specifications (rules and procedures that coordinate the devices)
    • Communication channel (carries the message)

    Communication Channels

    • Physical connections using wire or cable
    • Wireless connections

    Wireless Connections

    • Wireless connections do not use a solid substance to connect, primarily using radio waves
    • Primary wireless technologies are cellular, Bluetooth, Wi-Fi, microwave, WiMax, and satellite connections
    • Key Wi-Fi alliance and IEEE standards and their maximum data rates are provided in table format

    Physical Connections

    • Physical connection uses solid medium to connect between sending and receiving devices
    • Twisted pair cable: two pairs of copper wire twisted together (telephone lines, Ethernet cables)
    • Coaxial cable: single solid copper core (Cable TV)
    • Fiber-optic cable: tiny glass tubes

    Primary Wireless Technology

    • Bluetooth (short-range) – radio communication standard
    • Wi-Fi (wireless fidelity) – uses high-frequency radio waves
    • Microwave – uses high-frequency radio waves
    • WiMax (extends Wi-Fi) – new standard that extends Wi-Fi range using microwave
    • Cellular – use multiple antennae for communication
    • Satellite – uses satellites as microwave relay stations
    • Infrared - Uses infrared light for communication over short distances
    • GPS – determines geographic location of devices

    Connection Device Signals

    • Types of signals (analog, digital)
    • Transfer rates (Mbps – million bits per second, Gbps – billion bits per second, Tbps – trillion bits per second)

    Connection Devices

    • Modem – modulator-demodulator
    • Modulation – converting digital to analog
    • Demodulation – converting analog to digital
    • Transfer rate – speed of data transfer, usually measured in megabits per second (Mbps)

    Types of Modems

    • Digital Subscriber Line (DSL) – high-speed telephone lines
    • Cable – uses coaxial cable
    • Wireless – also known as WWAN

    Connection Services

    • Leased lines (T1 combined to form T3 and DS3, replaced by OC lines, faster optical carrier lines, higher capacity, not affordable for individuals)
    • DSL (uses phone lines, increasingly ADSL most commonly used)
    • Cable (uses existing TV cable, faster than DSL)
    • Other Connection Services

    Network Types

    • LAN (Local Area Network) - located within close proximity
    • Home - Local area network for home use, usually wireless (WLAN)
    • Wireless Local Area Network (WLAN) - wireless local area network, communication passes through an access point
    • Personal Area Network (PAN) - connects digital devices
    • Metropolitan Area Network (MAN) - typically spans cities, coverage up to 100 miles
    • Wide Area Network (WAN) - countrywide or worldwide coverage

    Network Architecture

    • How the network is arranged and resources are shared
    • Network Topology – physical arrangement of the network
    • Network Strategy – How the information and resources are shared
    • Key network topologies including ring, star, tree, and mesh

    Network Strategies

    • Client/Server Network – Central computers coordinate and supply services, server provides access, client requests services, typical server OS ex. Windows Server, macOS X Server, Linux, and Solaris
    • Peer-to-Peer (P2P) Network – All nodes have equal authority, can act both as client and server

    Organizational Networks

    • Intranet – private network within an organization, works like the internet
    • Extranet – private network that connects more than one organization, works like internet with limited access for trusted partners

    Network Security

    • Firewall – hardware/software controls access to a network
    • Proxy server – provides pass-through access, protects against external threats
    • Intrusion Detection System (IDS) – Works with firewall to protect organization's network, analyzes incoming/outgoing network traffic
    • Virtual Private Network (VPN) – creates secure private network between user computer and the organization

    Network Security Graphic

    • Diagram of intranet, extranet, and proxy servers

    Careers in IT

    • Network Administrator – manages company's LAN and WAN networks, responsible for design, implementation, and maintenance; maintains networking hardware/software, must diagnose and repair problems, candidates typically have Bachelor's/Associate's degree in computer science, computing technology, or information systems, experience with network security is preferred, certification and good communication skills are preferred

    A Look to the Future

    • Telepresence – seeks to create the illusion of being at a remote location, early implementations focus on an extension of video-conferencing, will allow to touch things in a remote location through robotics

    Open-Ended Questions

    • Define communications (connectivity, wireless revolution, communication systems)
    • Discuss communication channels (physical and wireless connections)
    • Discuss connection devices (modems, etc) and connection services
    • Discuss data transmission (bandwidths, protocols, IP addresses, etc)
    • Discuss networks (terms, types)
    • Define network architecture (topologies, strategies)
    • Discuss organization networks (intranets, extranets, security)

    Studying That Suits You

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

    Quiz Team

    Related Documents

    Description

    This quiz explores key concepts of connectivity and communication systems in our increasingly connected world. Students will delve into physical and wireless communication channels, network architectures, and the factors influencing data transmission. Test your understanding of network terminology and security issues related to Internet technologies.

    More Like This

    Use Quizgecko on...
    Browser
    Browser