Internet Information Services (IIS) is a web server software developed by Microsoft for hosting websites, applications, and services on Windows servers. IIS supports various protocols for communication and data transfer. Here are some of the common protocols used with IIS:
Hypertext Transfer Protocol (HTTP): HTTP is the foundation of web communication. IIS uses HTTP to deliver web pages, process client requests, and send responses back to the client's web browser. HTTP operates on TCP port 80 by default.
Secure Hypertext Transfer Protocol (HTTPS): HTTPS is an extension of HTTP that adds a layer of encryption and security. It uses SSL/TLS protocols to secure the communication between the client and the server. IIS supports HTTPS on TCP port 443.
File Transfer Protocol (FTP): FTP is a standard protocol for transferring files between computers over a network. IIS includes an FTP server that enables users to upload, download, and manage files on an IIS-hosted website. FTP operates on TCP ports 20 and 21.
Secure FTP (SFTP): SFTP is an extension of FTP that adds encryption and authentication using SSH (Secure Shell) protocols. Unlike FTP, which runs on separate ports, SFTP uses a single port for both control and data transfer. IIS does not include native support for SFTP, but third-party extensions can be used.
Simple Mail Transfer Protocol (SMTP): SMTP is a protocol for sending email messages between servers. IIS includes an SMTP server that can be used to send outgoing emails from web applications hosted on the server. SMTP operates on TCP port 25.
Network News Transfer Protocol (NNTP): NNTP is a protocol used for reading and posting Usenet articles and messages in newsgroups. IIS includes an NNTP server that enables hosting and management of newsgroups. NNTP operates on TCP port 119.
WebDAV: WebDAV (Web Distributed Authoring and Versioning) is an extension of HTTP that enables collaborative editing and remote file management. IIS supports WebDAV, allowing users to interact with files on a web server using standard HTTP methods. WebDAV typically uses TCP port 80 for HTTP and TCP port 443 for HTTPS.
These are some of the commonly used protocols with IIS. Depending on your specific requirements and configurations, you may enable or disable certain protocols as needed for your web server setup.