chapter 19
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Chapter 19. PCs on the Internet. 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. - PowerPoint PPT PresentationTRANSCRIPT
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A+ Guide to Managing and Maintaining Your PCFifth Edition
Chapter 19
PCs on the Internet
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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, email clients, and file transfer software
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Client/Server Applications on the Internet
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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
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5 A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using IP and Port Addresses to Identify Services
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Common Port Assignments
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TCP/IP Network Layers
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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)
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TCP/IP Protocols Used by the OS for Network CommunicationTCP 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
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Internet Protocol (IP)
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Transmission Control Protocol (TCP)
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TCP/IP Utilities
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TCP/IP Utilities (continued)
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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
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Ways to Connect to the Internet
Standard dial-up modem
DSL
Cable modem
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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
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How Dial-up Networking Works
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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
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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
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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
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Configuring the Windows 98 Dial-up Networking Connection
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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
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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
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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
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Cable Modem
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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
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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
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Implementing a Firewall
Filters data packets, ports, applications, and information
Hardware firewalls
Software firewalls
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Hardware Firewalls
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Software Firewalls
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Supporting Internet Clients
Web browsers
FTP (File Transfer Protocol)
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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
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URL Structure
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Top-Level Domain Names
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Ensuring Privacy Between the Web Server and Browser
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Configuring a Browser
Internet Explorer
Internet Options window
Netscape Navigator
Edit - Preferences
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Configuring a Browser (continued)
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Configuring a Browser (continued)
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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
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Supporting Email
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Supporting Email (continued)
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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
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FTP from a Command Prompt
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File Transfer Using FTP
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File Transfer Using FTP (continued)
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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)