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A+ Guide to Managing and Maintaining Your PCFifth 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, email 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 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
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 Email
41 A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Supporting Email (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, email clients, FTP software)