A server is a computer that provides data or services to other computers. It may serve data to system on a local area network (LAN) or a wide area network (WAN) over the internet. In business there are many types of servers exist, including, web servers, mail servers, and file servers. Each type runs software specific to the purpose of the server.
A Web server may run Apache HTTP server or Microsoft IIS, which both provide access to websites over the internet. A mail server may run a program like Microsoft exchange, Exim or Mail, which provides SMTP services for sending and receiving email. A file server might use Samba or the operating system’s built in file sharing services to share files over a network.
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