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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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