Normally, if you install Apache as shown in the previous recipe, you can host exactly one website that is accessible as the server's IP address or the domain name Apache is running on, for example,
http://www.centos7.home. Such a system is very wasteful for your server resources as you would need individual servers with Apache installed for every single domain you want to host. Name-based or virtual hosting is used to host multiple domains on the same Apache web server. If a number of different domain names have already been assigned to your Apache web server's IP address using a DNS server or through a local
/etc/hosts file, virtual hosts can be configured for every available domain name ...