Virtual servers


	Lesson 6 Objective	Virtual servers Common Web server conventions including virtual servers
		Most enterprise-grade Web servers such as IIS and Apache Server allow you to create multiple instances of themselves on the same machine. In other words, after you install Apache Server once, you can then tell it to serve up two or more sites. You can bind multiple IP addresses to the same NIC, or place multiple NICs into the computer. You can then tell your Apache Server to serve each of these sites discretely on each of the IP addresses. This way, a user can go to www.onecompany.com (207.18.188.235) and www.anothercompany.com (207.18.188.236), and not even realize that the sites exist on the same server. IP address: An IP address is a number that is used to uniquely identify computers connected to the Internet. Network interface card (NIC): A network interface card is an expansion board that connects a computer to a network. Most NICs are designed for a particular type of network, protocol, and media, although some can serve multiple networks. Click the link below to learn more about virtual servers and DNS. DNS Servers In the next lesson, you will learn about default documents, directory browsing, and error messages.