A+ Guide to Managing and Maintaining Your PC Fifth Edition Chapter 19 PCs on the Internet

2 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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, clients, and file transfer software

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

4 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

8 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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)

9 A+ Guide to Managing and Maintaining Your PC, Fifth Edition TCP/IP Protocols Used by the OS for Network Communication TCP Guarantees packet delivery Connection-oriented protocol UDP Does not guarantee delivery Connectionless protocol IP Breaks up and reassembles data into packets; routes them to their destination ARP Locates host on a local network RARP Discovers Internet address of host on local network ICMP Communicates problems with transmission

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

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

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

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

14 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

16 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

18 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

19 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

20 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

22 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

23 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

24 A+ Guide to Managing and Maintaining Your PC, Fifth Edition Installation of DSL and Cable Modem Internet Connections 1.Install network card and drivers to control it 2.Use network cable to connect PC to cable modem or DSL box 3.Install TCP/IP and bind TCP/IP to the card 4.Configure TCP/IP to connect to Internet or LAN 5.Install application software (eg, browser) to use the connection

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

26 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

27 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

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

32 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

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

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

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

39 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

42 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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

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

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

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

46 A+ Guide to Managing and Maintaining Your PC, Fifth Edition 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, clients, FTP software)