A server is a computer program that provides services to other computer programs and users. There are different types of servers including stand-alone servers which are not part of a domain or workgroup, domain servers which have server operating systems and active directory installed to act as domain controllers, and member servers which have server operating systems installed and are joined to a domain but do not have active directory.

1. What is Server?
Types of Server

2. Server
• A server is a computer program that provides
services to other computer programs (and
their users) in the same or other computers.

3. Types of Server
• Stand-alone server
• a stand-alone server is a server that neither
belongs to governs nor Windows domain; the
server may, however, belong to a workgroup
(a peer-to-peer network of Microsoft
Windows computers).

4. Domain Server
• A computer with a server OS and AD installed
is a Domain Controller.

5. Member Server
• Any other computer with a server OS (or
functioning as a server, for example with SQL
Server installed) can be called a member
server (if it is joined to the domain). A
member server does not have AD installed. I
don't recall seeing the term "AD server".