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CHAPTER 7. NETWORKS, TELECOMMUNICATIONS, AND WIRELESS COMPUTING. Chapter Seven Overview. SECTION 7.1 – NETWORKS AND TELECOMMUNICATIONS Network Basics Architecture Topology Protocols Media E-Business Networks SECTION 7.2 – WIRELESS COMPUTING Wireless Fidelity

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Chapter 7

CHAPTER 7

NETWORKS, TELECOMMUNICATIONS, AND WIRELESS COMPUTING


Chapter seven overview
Chapter Seven Overview

  • SECTION 7.1 – NETWORKS AND TELECOMMUNICATIONS

    • Network Basics

    • Architecture

    • Topology

    • Protocols

    • Media

    • E-Business Networks

  • SECTION 7.2 – WIRELESS COMPUTING

    • Wireless Fidelity

    • Business Drivers for Wireless Technologies

    • Advantages of Enterprise Mobility

    • The Future of Wireless


Learning outcomes
LEARNING OUTCOMES

  • Compare LANs, WANs, and MANs

  • List and describe the four components that differentiate networks

  • Compare the two types of network architectures

  • Explain topology and the different types found in networks

  • Describe TCP/IP along with its primary purpose

  • Identify the different media types found in networks


Network basics
NETWORK BASICS

  • Telecommunication system -enable the transmission of data over public or private networks

  • Network -a resource-sharing system created by linking two or more computers following an establishing standards or protocols


Network basics1
NETWORK BASICS

  • The three types of networks include:

    • Local area network (LAN): One building, a small group of buildings, office, or a home.

  • Metropolitan area network (MAN): Joins LANS across campuses

  • Wide area network (WAN): Across the country or around the world (Internet)



Network basics3
NETWORK BASICS

  • Networks are differentiated by the following:

    • Architecture - peer-to-peer, client/server

    • Topology - bus, star, ring, hybrid, wireless

    • Protocols - Ethernet, Transmission Control Protocol/Internet Protocol (TCP/IP)

    • Media - coaxial, twisted-pair, fiber-optic


Architecture
ARCHITECTURE

  • There are two primary types of architectures

    • Peer-to-peer (P2P) network

    • Client/server network

    • http://www.youtube.com/watch?v=Ve7_4ot-Dzs


Peer to peer networks
Peer-to-Peer Networks

  • Peer-to-peer (P2P) network - any network without a central file server and in which all computers in the network have access to the public files located on all other workstations


Client server networks
Client/Server Networks

  • Client- a computer that is designed to request information from a server

  • Server - a computer that is dedicated to providing information in response to external requests

    • Client/server network -model for applications in which the bulk of the back-end processing takes place on a server, while the front-end processing is handled by the clients


Topology
TOPOLOGY

  • Network topology - refers to the geometric arrangement of the actual physical organization of the computers and other network devices) in a network

    • Bus

    • Star

    • Ring

    • Hybrid

    • Wireless



Protocols
PROTOCOLS

  • Protocol - a standard that specifies the format of data as well as the rules to be followed during transmission (e.g. language)

  • Interoperability - the capability of two or more computer systems to share data and resources, even though they are made by different manufacturers



Ethernet
Ethernet

  • Ethernet - a physical and data layer technology for LAN networking


Transmission control protocol internet protocol
Transmission Control Protocol/ Internet Protocol

  • Transmission Control Protocol/Internet Protocol (TCP/IP) - provides the technical foundation for the public Internet as well as for large numbers of private network

  • TCP/IP applications

    • File transfer protocol (FTP)

    • Simple mail transfer protocol (SMTP)

    • Hypertext transfer protocol (HTTP)

    • Simple network management Protocol (SNMP)


Voice over ip voip
Voice over IP (VoIP)

  • Voice over IP (VoIP) -uses TCP/IP technology to transmit voice calls over long-distance telephone lines

  • Can you recall some companies that offer VOIP?


Media
MEDIA

  • Network transmission media -refers to the various types of media used to carry the signal between computers

    • Wire media (guided)

    • Wireless media (unguided)


Wire media
Wire Media

  • Wire media - transmission material manufactured so that signals will be confined to a narrow path and will behave predictably

  • Three most commonly used types include:

    • Twisted-pair wiring

    • Coaxial cable

    • Fiber optic (or optical fiber)



Wireless media
Wireless Media

  • Wireless media - natural parts of the Earth’s environment that can be used as physical paths to carry electrical signals

  • Wireless fidelity (wi-fi) – a means of linking computers using infrared or radio signals

  • Common examples of wireless devices include:

    • Cellular phones and pagers

    • Global positioning systems (GPS)

    • Cordless computer peripherals

    • Home-entertainment-system control boxes

    • Two-way radios

    • Satellite television


Wireless fidelity wi fi
WIRELESS FIDELITY (WI-FI)

  • Disruptive wireless technologies

    • WiMax wireless broadband

    • Radio frequency identification tags (RFID)


The value of timely information
The Value of Timely Information

  • Timeliness is an aspect of information that depends on the situation

    • Real-time information – immediate, up-to-date information

    • Real-time system – provides real-time information in response to query requests


Business drivers for wireless technologies
BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES

  • Mobile and wireless are often used synonymously, but actually denote two different technologies

    • Mobile technology - means the technology can travel with the user, but it is not necessarily in real-time

    • Wireless technology - gives users a live (Internet) connection via satellite or radio transmitters


Business drivers for wireless technologies1
BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES

  • Drivers of wireless technology growth include:

    • Universal access to information and applications

    • The automation of business processes

    • User convenience, timeliness, and ability to conduct business 24x7


Technology adoption us
Technology Adoption (US)

Forbes Magazine July 7th, 1997


Business drivers for wireless technologies2
BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES

  • Wireless devices changing business include:

    • Wireless local area network (wLAN)

    • Cellular phones and pagers

    • Cordless computer peripherals

    • Satellite television

    • WiMax wireless broadband

    • Security sensor


Bluetooth
Bluetooth

  • Bluetooth – an omnidirectional wireless technology that provides limited-range voice and data transmission over the unlicensed 2.4-GHz frequency band, allowing connections with a wide variety of fixed and portable devices that normally would have to be cabled together


Radio frequency identification
Radio Frequency Identification

  • Radio frequency identification (RFID) - use active or passive tags in the form of chips or smart labels that can store unique identifiers and relay this information to electronic readers

  • RFID tag - contains a microchip and an antenna, and typically work by transmitting a serial number via radio waves to an electronic reader, which confirms the identity of a person or object bearing the tag



Satellite
Satellite

  • Microwave transmitter – commonly used to transmit network signals over great distances


Global positioning system
Global Positioning System

  • Global positioning system (GPS) – a device that determines current latitude, longitude, speed, and direction of movement

    • Market for GPS services is at $5 billion with expectations for the demand to double over the next five years

  • Geographic information system (GIS) – designed to work with information that can be shown on a map


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