Features of the Internet 

Began in late 1960's by the US Army
There is no central structure by design
World's largest E-mail system
Tens of millions of host computers
Hundreds of Millions of users
Services: E-mail, WWW, FTP, Telnet, more

Protocol 

A set of rules for the exchange of information and data
TCP/IP common to all Internet messages

Electronic Mail 

E-mail
Address is composed of User (account) name and domain name separated by @ 
The single most important service offered on the Internet

World Wide Web 

"The Web" "WWW" 
Largest information service on the Internet
Graphic display of online hypertext

Web Browser 

The program that runs on your computer and enables you to use the World Wide Web

URL 

Uniform Resource Locator
The Internet address for a specific document or other resource
May become invalid as resources are moved

Search Engine 

Used to locate Web information

Web page 

An electronic document on the WWW

Home page 

The starting point for a WWW site

Link 

Clicking on a link allows you to get more information 

Usually highlighted, may be a graphic

Bookmark, Favorite 

URL that has been saved for future reference

LISTSERV 

An on-line mailing list

USENET 

The network of computers on the Internet offering News Groups

FTP 

File Transfer Protocol 
Used for sending and receiving files on the Internet

Telnet 

Used to connect to a remote CLI computer

HTML

Hypertext Markup Language
Used to create pages on the World Wide Web
Hypertext employs links to allow users to transfer to new pages to get more information

Fully Qualified Domain Name

FQDN
Always ends with a top-level domain
Identifies a particular computer
Text strings separated by dots

Domain Name Service

DNS
Translates a FQDN into an IP address