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Chapter 19

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  1. Chapter 19 PCs on the Internet

  2. You Will Learn… • About the TCP/IP suite of protocols • How to connect to the Internet using dial-up, DSL, and cable modem connections • About supporting common Internet clients such as Web browsers, email clients, and file transfer software A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  3. Client/Server Applications on the Internet A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  4. The TCP/IP Suite of Protocols • How a client addresses a server application on another computer • How protocols in TCP/IP suite are used on intranets and Internet to support client/server applications A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  5. Using IP and Port Addresses to Identify Services A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  6. Common Port Assignments A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  7. TCP/IP Network Layers A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  8. TCP/IP Protocol Layers • Applications protocols • Applications make an API call to the OS • TCP/IP protocols used by the OS for network communication • Network protocols used by hardware • Included in firmware and drivers on a single NIC • Protocol used depends on type of physical network data is traveling on (eg, PPP) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  9. TCP/IP Protocols Used by the OS for Network Communication A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  10. Internet Protocol (IP) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  11. Transmission Control Protocol (TCP) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  12. TCP/IP Utilities A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  13. TCP/IP Utilities (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  14. Other Tools • Microsoft SNMP Agent • Provides system management for networks • Can be security risk • NSLookup • Reports information about Internet name space • Requests information about domain name resolutions from DNS server’s zone data A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  15. Ways to Connect to the Internet • Standard dial-up modem • DSL • Cable modem A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  16. Dial-up Networking • Uses PPP to send packets of data over phone lines • Must install modem and drivers to run it • Must install TCP/IP and bind it to the modem A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  17. How Dial-up Networking Works A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  18. Creating a Dial-up Networking Connection • Windows XP • Network Connections applet in Control Panel • Windows 2000 • Network and Dial-up Connections applet in Control Panel • Windows 9x • Dial-up Networking and Network Connection applets in My Computer A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  19. Creating a Dial-up Connection in Windows 2000/XP • Using Windows XP, launch New Connection Wizard • Configure connection using Properties window of the connection icon A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  20. Creating a Dial-up Connection in Windows 98 • Install Dial-Up Networking as an OS component on PC using Add/Remove Programs applet in Control Panel • At same time, a dial-up adapter (virtual network card) is also installed • Create and configure Dial-up Networking connection A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  21. Configuring the Windows 98 Dial-up Networking Connection A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  22. Dial-up Networking Problems • Cannot make a connection • Can connect, but get message “Unable to resolve hostname…” • After connecting, get error message “Unable to establish a compatible set of network protocols” • When double-click Web browser, modem does not dial automatically A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  23. DSL and Cable Modem Connections • Broadband technologies • Support transmission of more than one kind of data at once • TCP/IP settings usually the same as modem-to-phone line connection • Use a network card in the PC for physical connection to network A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  24. Installation of DSL and Cable Modem Internet Connections • Install network card and drivers to control it • Use network cable to connect PC to cable modem or DSL box • Install TCP/IP and bind TCP/IP to the card • Configure TCP/IP to connect to Internet or LAN • Install application software (eg, browser) to use the connection A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  25. Cable Modem A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  26. DSL and ISDN Service • Provided by local telephone company • Uses DSL/ISDN converter box, sometimes combined with a router • DSL uses a DSL router • ISDN connection uses Terminal Adapter (TA) or ISDN router A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  27. Sharing Internet Connections • One computer on the LAN with direct connection to Internet can serve as host computer for others on the LAN (ICS) • For broadband connections, broadband converter box can connect to network device that manages connection for entire network • Router can serve as a wireless access point for computers to connect wirelessly to Internet A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  28. Implementing a Firewall • Filters data packets, ports, applications, and information • Hardware firewalls • Software firewalls A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  29. Hardware Firewalls A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  30. Software Firewalls A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  31. Supporting Internet Clients • Web browsers • Email • FTP (File Transfer Protocol) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  32. Supporting Web Browsers • Addresses that Web browsers use to locate resources on a Web server (Uniform Resource Locator) • Ensuring privacy with HTTPS and SSL • Troubleshooting common problems that occur with Web browsers A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  33. URL Structure A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  34. Top-Level Domain Names A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  35. Ensuring Privacy Between the Web Server and Browser A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  36. Configuring a Browser • Internet Explorer • Internet Options window • Netscape Navigator • Edit - Preferences A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  37. Configuring a Browser (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  38. Configuring a Browser (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  39. Solving Browser Performance Problems • Clean up hard drive (Defrag, ScanDisk) • Optimize system settings (System Information) • Clear browser cache and Web page history • Suppress image downloads • Download browser updates and patches A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  40. Supporting Email A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  41. Supporting Email (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  42. Supporting FTP • Used to transfer files between two computers using the same or different operating system(s) • Both computers must have FTP installed • Can be executed from user-friendly GUI software or from a command prompt A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  43. FTP from a Command Prompt A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  44. File Transfer Using FTP A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  45. File Transfer Using FTP (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  46. Summary • Connecting to the Internet using Windows • How TCP/IP suite of protocols is used • How to create and troubleshoot dial-up and broadband connections to the Internet • How to support popular applications that use the Internet (Web browsers, email clients, FTP software) A+ Guide to Managing and Maintaining Your PC, Fifth Edition