Webservers are the one which interacts between Client and Server. The person who performs an
request is an client and server is responsible for responding those type of requests from various
clients. Webserver is an software which acts like interface between client and  server. Example of
client – server model is an email signup process or any dynamic page which does the response
based on your input.  We are going to see about some popular webservers, they are IIS and Apache.

IIS - Internet Information Services  is an websever comes with windows operating systems with an
optional  installation option. Apache is the open source web server available for almost all operating
systems. Server is an server scripting program like PHP, ASP which runs under the webserver control.
Webserver does the job of  Process Queue Controlling number of users, Database controls, etc.
It also provides options to edit both Server script and Database configurations under an single config
file. It is an mandatory for running server side scripts.