IIS and APACHE
when a user creates a website through the Plesk GUI, Plesk propagates this request to a web server, either Apache or IIS, and the latter adds a new virtual host to the system. This method of administering all system services from a single web interface reduces maintenance costs and gives administrators more flexibility and control.
Website Directory Structure
When a Website is created, Plesk not only adds a new virtual host to the web server but also creates the site’s directory structure and fills the directories with certain initial content. These directories are located in the corresponding virtual host directories. On Windows:
By default, Plesk works in cooperation with a mail server, which enables to run the mail services on the same machine on which you host websites. Mail Server has Webmail Services, IMAP, POP, SMTP along with ANTISPAM Tools and Antivirus Control.
Plesk works in cooperation with a DNS server which enables to run the DNS service on the same machine where you host websites. This server is BIND on Microsoft DNS or BIND on Windows. Plesk also allows you to switch off the DNS service for all or certain domains hosted on your server.
Plesk 12.5 for Windows supports Microsoft SQL Server Express 2008 and 2012, and MySQL 5.1. By default, MySQL and Microsoft SQL Server 2008 are installed during Plesk installation. You can additionally install Microsoft SQL Server 2012.
Backup & Restoration
Using Backup Tools Manage Services like Back up the entire server,Back up individual user accounts with websites, Back up individual subscriptions (webspaces), Schedule backups, Restore data from backup archives.