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  1. 1. Internet,LAN/WAN Networking:
  2. 2. Learning Objectives <ul><li>Define and identify the different types of networks </li></ul><ul><li>Describe the history of LANs and WANs </li></ul><ul><li>Discuss LAN and WAN integration, including the basic functions of bridges, routers, gateways, and switches </li></ul><ul><li>Describe network protocol integration methods </li></ul><ul><li>Explain the preparatory steps of network design </li></ul>
  3. 3. Computer Network <ul><li>System of computers, print devices, and computer software linked by communications cabling or radio waves </li></ul><ul><li>Typically classified according to: </li></ul><ul><ul><li>Reach and complexity </li></ul></ul><ul><ul><li>Protocols and topologies </li></ul></ul>
  4. 4. Network Communication
  5. 5. Network Types Defined <ul><li>Local area networks </li></ul><ul><li>Metropolitan area networks </li></ul><ul><li>Wide area networks </li></ul>
  6. 6. Local Area Network (LAN) <ul><li>Series of interconnected computers, printing devices, and other computer equipment that share hardware and software resources </li></ul><ul><li>Service area usually limited to a given office area, floor, or building </li></ul>
  7. 7. Example of a LAN
  8. 8. Metropolitan Area Network <ul><li>Links multiple LANs in a large city or metropolitan region </li></ul><ul><li>Typically uses fiber-optic connections </li></ul>
  9. 9. Example of a MAN
  10. 10. Using a LAN In this drive mapping example, a server’s drive C is mapped as drive F by a workstation. After the mapping is complete, the server’s hard disk appears in the workstation’s directory as drive F and can be used just as though it were a drive connected directly to the workstation. CLICK TO START
  11. 11. Using a LAN <ul><li>You can allow other network users to view and edit files in the folders you’ve designated as shared </li></ul>
  12. 12. Using a LAN <ul><li>The Network Connection tool helps you troubleshoot connection problems </li></ul>
  13. 13. Wide Area Network (WAN) <ul><li>Far-reaching system of networks that usually extends over 30 miles and often reaches across states and continents </li></ul>
  14. 14. Network Classification <ul><li>Enterprise network </li></ul><ul><ul><li>Combination of LANs, MANs, or WANs that provides users with an array of computer and network resources to complete different tasks </li></ul></ul>
  15. 15. Enterprise Network
  16. 16. Identifying a Network Type <ul><li>Communications medium </li></ul><ul><ul><li>Wire cable, fiber-optic cable, radio waves, microwaves </li></ul></ul><ul><li>Protocol </li></ul><ul><ul><li>How networked data is formatted into discrete units </li></ul></ul><ul><ul><li>How each unit is transmitted and interpreted </li></ul></ul><ul><li>Topology </li></ul><ul><ul><li>Physical layout of cable and logical path </li></ul></ul><ul><li>Network type </li></ul><ul><ul><li>Private versus public </li></ul></ul>
  17. 17. LAN/WAN Integration <ul><li>1960s-1980s </li></ul><ul><ul><li>Direct connection to host mainframe using Systems Network Architecture (SNA) communications protocol </li></ul></ul><ul><li>Networks </li></ul><ul><ul><li>Allow connections to many devices </li></ul></ul><ul><ul><li>Enable distributed client/server computing </li></ul></ul>
  18. 18. Using SNA to Directly Connect without a Network
  19. 19. LAN/WAN Integration <ul><li>Becoming more advanced through networking devices </li></ul><ul><ul><li>Bridges </li></ul></ul><ul><ul><li>Routers </li></ul></ul><ul><ul><li>Gateways </li></ul></ul><ul><ul><li>Switches </li></ul></ul>
  20. 20. Bridges <ul><li>Connect different LANs or LAN segments using the same access method </li></ul>
  21. 21. Routers <ul><li>Connect networks having the same or different access methods and media </li></ul><ul><li>Forward packets and frames to networks by using a decision-making process based on: </li></ul><ul><ul><li>Routing table data </li></ul></ul><ul><ul><li>Discovery of most efficient routes </li></ul></ul><ul><ul><li>Preprogrammed information from network administrator </li></ul></ul>
  22. 22. Routers
  23. 23. Gateways <ul><li>Enable communications between two different types of networked systems </li></ul>
  24. 24. Gateways
  25. 25. Switches <ul><li>Link network segments </li></ul><ul><li>Forward and filter frames between segments </li></ul>
  26. 26. Network Classifications
  27. 27. Organizational Structure: Client/Server and Peer-to-Peer continued…
  28. 28. Network Design Introduction <ul><li>Assess characteristics of the organization that affect network design </li></ul><ul><ul><li>Types and locations of computers </li></ul></ul><ul><ul><li>Software applications and resources required </li></ul></ul><ul><ul><li>Business patterns </li></ul></ul><ul><ul><li>High and low network use periods </li></ul></ul><ul><ul><li>Designing to facilitate troubleshooting </li></ul></ul><ul><ul><li>Type of security required </li></ul></ul><ul><ul><li>Anticipated growth </li></ul></ul>
  29. 29. IP Addresses <ul><li>IP addresses are addresses that identify computers on the Internet </li></ul><ul><ul><li>Static IP address </li></ul></ul><ul><ul><li>Dynamic IP address </li></ul></ul>
  30. 30. Network Links <ul><li>Wired network </li></ul><ul><ul><li>Twisted-pair cable </li></ul></ul><ul><ul><li>Coaxial cable </li></ul></ul><ul><ul><li>Fiber-optic cable </li></ul></ul><ul><li>Wireless network </li></ul><ul><ul><li>RF signals </li></ul></ul><ul><ul><li>Microwaves </li></ul></ul><ul><ul><li>Infrared light </li></ul></ul>
  31. 31. Internet Protocols <ul><li>TCP and IP serve as the primary protocols responsible for message transmission on the Internet </li></ul>
  32. 32. Cable Internet Service <ul><li>Cable modems convert your computer’s signal into one that can travel over the CATV network </li></ul><ul><li>Always-on connection </li></ul><ul><li>Neighborhood network </li></ul>
  33. 33. Cable Internet Service
  34. 34. ISP Infrastructure
  35. 35. Wi-Fi <ul><li>WEP (Wired Equivalent Privacy) encrypts data traveling over wireless networks </li></ul><ul><li>Equipment required for a wireless network </li></ul><ul><ul><li>Wi-Fi card </li></ul></ul><ul><ul><li>Wireless access point </li></ul></ul><ul><li>Bluetooth is a short-range wireless network technology </li></ul>
  36. 36. Wireless Internet Service <ul><li>Direct satellite service (DSS) </li></ul>
  37. 37. Wireless Internet Service <ul><li>Fixed wireless Internet service broadcasts RF signals in order to offer Internet access to large areas </li></ul><ul><ul><li>WiMAX </li></ul></ul><ul><ul><li>Wireless service providers are usually local or regional businesses </li></ul></ul>
  38. 38. LAN Internet Access <ul><li>Cost-effective way to share one Internet connection among several computers </li></ul><ul><li>To establish LAN Internet access, you need: </li></ul><ul><ul><li>An operational wired or wireless LAN </li></ul></ul><ul><ul><li>A router or a hub with router capabilities </li></ul></ul><ul><ul><li>A high-speed Internet connection, such as DSL, ISDN, or cable Internet </li></ul></ul><ul><ul><li>A modem that corresponds to your Internet connection type </li></ul></ul>
  39. 39. Mobile Internet Access <ul><li>A Wi-Fi hotspot is a wireless broadband Internet service offered in a public location </li></ul><ul><ul><li>WISP </li></ul></ul><ul><li>WAP is a communications protocol that provides Internet access from handheld devices </li></ul>
  40. 40. Mobile Internet Access <ul><li>Handheld device services include: </li></ul><ul><ul><li>Short message service (SMS) </li></ul></ul><ul><ul><li>Multimedia messaging (MMS) </li></ul></ul><ul><ul><li>Music fingerprinting </li></ul></ul><ul><ul><li>Games </li></ul></ul><ul><ul><li>City guides </li></ul></ul><ul><ul><li>E-mail </li></ul></ul><ul><ul><li>News, sports, stocks, and weather </li></ul></ul>
  41. 41. Mobile Internet Access <ul><li>Cellular service options </li></ul>