IIS is not installed by default in new installations of Windows Server 2003, unlike previous versions. You can choose from several “subprograms” that each perform a different service and install them as you need them. IIS is the moniker that refers to all these services collectively. This section will highlight the individual components and provide a bit of information about each.
The web server, named W3SVC, is, quite
obviously, the part of the software that makes files available for
web browsing using the HTTP protocol. You can support multiple DNS
domains on one server by using either multiple virtual servers or a
host headers. Host headers
examine the TCP/IP header of a web request, detect the intended
destination of the packet, and route it to the appropriate process,
thereby obviating the need for different domains to have unique IP
addresses on one machine.
This component of IIS (FTPSVC) enables you to transfer files from a server to a client. The FTP protocol dates back to the beginning of the Internet, and it’s still one of the most efficient ways to transfer large amounts of data between hosts over a wide area. However, FTP is inherently insecure because it transfers all data—including the username and password for authentication purposes—in clear text.
The Simple Mail Transfer Protocol (SMTP) is the protocol widely used to transport mail over the Internet. It’s the ...