We've already discussed how domain names are the text equivelent to a IP address. You still need to know that, but now we will discuss how the IP and domain match up, and how you can find out what domain names are available.

• You get IP address from your ISP or from any company that can host Web pages. The IP addresses go along with the servers of the company that is willing to host the Web page. There are hundreds of companies that can host Web pages, they range from $8.00 a month to $100's to host a Web page with one of these companies.
• Usually you can buy a domain name from these companies also. If you want a domain name, or if you want to see if a domain name is available you should go to www.networksolutions.com.   This company keeps the national database for all .com, .net and .org domain names.          
• On average it is $70 for a two year ownership for a domain name. After you purchase your domain name then you get it transferred to a IP address that you get from a Web hosting company. 
• Once your domain name and IP address is matched up with Network solutions the computers start broadcasting out that information to all the DNS servers which hold the tables that have that information. Eventually (short amount of time) all the DNS servers get updated with the new tables that have your IP and domain name, and then anybody can find your Web page.

Viruses - self replicate

Adware - uses cookies

Spyware - you invite on your computer, it generally communicates information back to a server

Review

1. What kinds of computers are on the internet and what are their functions

2. What do IP addresses and domain names look like?

3. What are the steps involved when a client requests a web page?

4. What is the difference between viruses, spyware, adware?