Telecommunications and Networking Overview

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Questions and Answers

What is packet switching primarily used for in digital communication?

  • Sending digital messages without division
  • Utilizing only one communication path at a time
  • Slicing messages into packets for transmission (correct)
  • Creating complete circuit connections

Which of the following layers is NOT part of the TCP/IP reference model?

  • Application layer
  • Transport layer
  • Physical layer (correct)
  • Internet layer

What is the primary function of a modem in telecommunications?

  • Enhancing internet speed
  • Creating network connections
  • Translating digital signals to analog (correct)
  • Amplifying analog signals

What type of network would typically cover a single organization or campus?

<p>Local area network (LAN) (C)</p>
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Which transmission medium is generally considered the fastest?

<p>Fiber optics cable (B)</p>
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In which context are bits per second (bps) commonly used?

<p>Indicating transmission speed (B)</p>
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Which of the following describes a peer-to-peer network?

<p>Direct communication between nodes without a central server (C)</p>
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What primary advantage does packet switching have over circuit switching?

<p>It makes more efficient use of network capacity. (A)</p>
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What is a primary function of a network server in client/server computing?

<p>To set rules of communication and provide addresses (B)</p>
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Which of the following is NOT a major component of a simple computer network?

<p>Video conferencing system (D)</p>
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What type of network allows for mobility and wireless connection among devices?

<p>Wireless Local Area Network (Wi-Fi) (C)</p>
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What is the purpose of a connection medium in a computer network?

<p>To facilitate communication between network devices (D)</p>
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Which of the following statements about software-defined networking (SDN) is true?

<p>It centralizes the control of network devices through programming (A)</p>
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What is the relationship between local area networks (LANs) and corporate networks in large organizations?

<p>Multiple LANs are often interconnected within larger corporate networks (D)</p>
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Which component acts as the gateway for data traffic across different networks?

<p>Router (C)</p>
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Which of the following technologies has largely replaced traditional centralized mainframe computing?

<p>Distributed computing model (C)</p>
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Flashcards

Packet Switching

A method of sending data in packets over various paths and reassembling them at the destination.

TCP/IP

A set of protocols governing communication on the internet, consisting of TCP and IP layers.

Four Layers of TCP/IP

Application, Transport, Internet, and Network Interface layers define how data is processed.

Local Area Network (LAN)

A network that connects computers over a short distance, such as in a home or office.

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Wide Area Network (WAN)

A network that covers a broad area, connecting multiple LANs, often through the internet.

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Modem Functions

Translates digital signals to analog and vice versa for communication over various media.

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Transmission Media

Physical media such as cables or wireless methods to transmit signals between devices.

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Bandwidth

The capacity of a transmission medium to transmit bits; measured in bps or Hertz.

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Telecommunications Networks

Systems used for electronic transfer of information between distant parties.

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Components of a Network

Key elements include clients, servers, NICs, and connection mediums.

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Client/Server Computing

A model where clients request services from servers managing network rules.

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Network Interface Card (NIC)

Hardware that connects a computer to a network.

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Software-Defined Networking (SDN)

Network management method where functions are controlled by a central program.

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Corporate Network Infrastructure

Integration of multiple local area networks to support a complete corporate system.

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Wireless LAN (Wi-Fi)

A LAN that allows devices to communicate without physical connections, using radio waves.

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Study Notes

Telecommunications, The Internet, and Wireless Technology

  • This presentation covers telecommunications, the internet, and wireless technologies.
  • Learning objectives include identifying key components of telecommunication networks and different types of networks.
  • Key trends include convergence, broadband, and broadband wireless.

Computer Network Components

  • A computer network consists of two or more connected computers.
  • Key components in a simple network include: client and server computers, network interfaces (NICs), connection medium, network operating system (NOS), hubs, switches, routers.
  • Software-defined networking (SDN) manages switch and router functions centrally.

Components of a Simple Computer Network

  • A simple network diagram shows interconnected PCs, servers, switches, and a router.

Networks in Large Companies

  • Large companies use many local area networks (LANs) connected to a wider corporate network.
  • This includes various powerful servers (web, intranet, extranet, backend systems), mobile wireless LANs (Wi-Fi networks), videoconferencing systems, and telephone networks (including wireless cell phones).

Key Digital Networking Technologies: Client/Server Computing

  • Client/server computing is a distributed model.
  • Clients connect through a network server, which controls communication.
  • Network servers give clients addresses for efficient network access.
  • It has largely replaced centralized mainframe computing, exemplified by the internet.

Key Digital Networking Technologies: Packet Switching

  • Packet switching breaks down digital messages into packets.
  • Packets follow different paths and are reassembled at the destination.
  • This is more efficient than circuit switching.

Key Digital Technologies: TCP/IP and Connectivity

  • TCP/IP protocols govern information transmission between points.
  • TCP/IP is a common worldwide standard for the internet.
  • The Department of Defence reference model defines four layers: application, transport, internet, and network interface.

Different Types of Networks

  • Network signals can be digital or analog; modems convert between them.
  • Network types include local area networks (LANs, such as Ethernet), client-server vs peer-to-peer, wide area networks (WANs), metropolitan area networks (MANs), and campus area networks (CANs).

Transmission Media and Speed

  • Transmission media include twisted pair wire, coaxial cable, and fiber optic cable.
  • Wireless communication methods (like satellites and cellular systems) also exist.
  • Transmission speed is measured in bits per second (bps) and Hertz; Bandwidth is also used in transmission speed discussions.

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