What is server?
A server is a special computer which serves special services to all other computers connected to it. User management, network management, file management are some example of its services.
Take an example of an office having 10 computers (nodes) and one printer. All of them must do work on a same project. It can be done if all of them keeps same copy of project and update all computers with updates. It is possible but quite cumbersome. Similarly a printer can be connected to any one of 10 computers. All of them can share it easily. But think about the authentication , limited access, logs for every user , management of projects, management of databases these are example of some services which is quite difficult to achieve without taking one computer as a server which provides all these services to rest all computers.
A server computer might be a single computer or hub of several computes.
Server are never shut down as they must always be available to provide services to other nodes. Although if necessary, they are shut down for maintenance but a stand by system should be available so that services are not affected.`
A server is a special computer which hosts/resides websites. Whenever a website name is requested through web browser it is sent to the server where the website is hosted. Server than transfers thee website contents (web page data) to the client’s computer from where the request had been made. Result is we see the websites on our computer browser like Internet Explorer, Firefox, Google Chrome , Opera etc.
If you are not connected or gets disconnected to the Internet while browsing any website, the data transfer from this server to your computer gets interrupted and you see the error (Page not found/Internet unavailable) etc.
