IIS is a protocol server. It is implemented as a set of several system services that use the most common Internet protocols including HTTP, FTP, NTTP and SMTP.
The Microsoft IIS is built into the Microsoft Windows NT Server operating system.
The Microsoft Internet Information Server is designed to deliver high speed and secure information publishing, while also serving as a platform for developers and independent software vendors to extend the Internet’s standard communication capabilities.
Security:
Digest Authentication
Secure Communications
Server-Gated Cryptography
Kerberos v5 Authentication Protocol Compliance
