What is a server? What is a client? – explanation for laymen & amp; professionals

A server is still the thing on the internet, right? - Well, sort of. We declare for amateurs and professionals, which is actually a server, and what you can do with the Internet.

2733What is a server?

Sometime people come into their digital career with the term server &# 8220; in compound&# 8221; - Haha, what a clever wit. But what a server is actually exactly what he is doing on the Internet? And what have the so-called clients to do with it?

What is a server?

A server is a computer first in the original sense. That must now no large closet be more - to the brim crammed with any hardware components. What he does exactly, one can perfectly guess at his name: Server comes from the English verb (to) serve what &# 8220; someone serve&# 8221; means.

A server can either only work in a closed (corporate) network or via the Internet be accessible. Strictly speaking, it is then even a part of the Internet:

  • What is the Internet? - Easy & declared non-boring
A server need not be a large closet anymore. They come in large and small. Device Source: Lenovo / SynologyA server need not be a large closet anymore. They come in large and small. Device Source: Lenovo / Synology

A server is basically a focal point in the network or the Internet, which take many requests, forward and will have to answer. Enabling it to overcome this, it is equipped with high performance hardware according to its task. The mentioned requests come by the way of the so-called clients (see explanation below).

There are different types of servers that perform different tasks:

  • Web servers - e.g. Apache. On his websites are stored, see HTTP.
  • File server - for example, WebDAV, Samba or FTP, see: Setting up an FTP server.
  • Printer Server - accepts print jobs and forwards them to the printer.
  • E-mail server - for example, IMAP / POP and SMTP server.
  • Database server - for example, MySQL
  • VPN server - closed, encrypted (remote) connection to a (private) network, see: What is VPN?
  • Proxy server - is used e.g. to conceal one's own IP address to be anonymous on the Internet.
  • Other server - for example, dedicated

For home users, it is now very easy to use your own server. A NAS server, for example, is as small as a shoe box and can take over by software packages multiple server tasks simultaneously. He acts for example as a file, web, email and cloud servers.

  • Setting up NAS server: goes like this&# 8217; s (manual)
  • NAS comparison QNAP vs. Synology? What hardware do I need?

Important: The chosen illustration is greatly simplified in order to understand the basic principle of both systems. Essentially, each client can be a server if it appropriate software is installed. Also a server can make client requests over the Internet.

What is a client?

Clients that everyone has and knows.Clients that everyone has and knows: PC, smartphone, tablet and laptop.

One server can support the clients. The word client also comes from English and means translated &Client; # 8220&# 8221; or &Customer; # 8220&# 8220 ;.

On example:

  1. If you want to open a Web page, then sends your PC or mobile device (as a client) IP address to the appropriate Web server and request &# 8220; Hey, I'd like the site&# 8221 ;.
  2. The server then responds and transmits the desired data.
  3. The web page opens in your browser.
  4. If too many clients simultaneously send many requests to a server, the server is busy. Attackers will be enforced as something that is then called DDoS attack.

If you liked this kind of statement, we have more for you:

  • How does a computer? - explanation for laymen & professionals
  • What is a hard drive? simply explained structure -


Posted In: GIGA TECH