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Describe the core components of the current Internet infrastructure and how they relate to each other. Content may include the following:
ISPs earn their money by leasing portions of their bandwidth to other ISPs, companies, or individuals. When you purchase an Internet connection from an ISP, you are really leasing part of their bandwidth. Some ISPs have a tendency to oversell their bandwidth, which usually results in a very slow Internet connection. When ISPs oversell their capacity, they are usually banking on the fact that most people do not spend hours constantly connected to the Internet retrieving information, which is called surfing.
In addition to an Internet connection, an ISP usually runs a high-speed LAN (local area network) that hosts a mail server, a news server, and several Web servers. Besides the basic Internet services that come with a lease, many ISPs offer server hosting (also known as Web hosting) services. Because of the expense of running a Web server on the Internet, many companies and home businesses find it more economical to pay an ISP to manage and maintain a Web server. For companies looking to increase the performance of their Web servers, and who have the resources to afford the service, the best method is to obtain Web hosting services from a backbone provider, who can put the server directly onto the Internet backbone.
Understand the concept of server (Web) hosting. Some ISPs offer companies the option of hosting their Web sites on an ISP's Web server. This allows companies to reduce the overhead costs associated with maintaining their own Web servers....