Type of Server

understanding Server
Servers are computers that functioned to serve, limit, and control access to the clients and resources on a computer network. Servers are also supported by the specification / hardware were great (in contrast to regular computer), server operating system mengfungsikan special called as a network operating system. In the server operating system there are a wide range of services that use client / server architecture.
function Server
Usefulness server very much, one of which is for the internet connection, science, or just storage. In view of the server functions can be categorized into several types, such as application servers, data servers and proxy servers. The application server is a server that is used to store a variety of applications that can be accessed by the client, the data server functioned well for storing data that is used directly or client data is processed by the application server. Proxy servers are useful to manage traffic in the network via the proxy settings. In general we are more familiar serveruntuk proxy can connect computers to the Internet.
Miscellaneous Application Server
The application server is a computer application that is useful serving an access request from the client computer. Here are the kinds of kinds of server applications.

1. Web Server

Web server software is installed on a server in order to provide services for data requests with http or https protocol which is accessed through a specific application such as a web browser. Web server responds to the request by sending back the content in the form of pictures, writings or the other and then present it via a web browser.
Examples of common web server and often used.
Apache Web server
Apache web server is the most widely used on the Internet. The program was first released for the UNIX operating system. In the next version of Apache issued a program that can run on Windows NT. Apache has a program very much, It provides a fairly complete feature for its users.
Litespeed Web server
Litespeed web server is a new technology that is created to replace the Apache web server in the future. According to the research results Litespeed has the advantage that is 50% faster in PHP and faster processing 6x compared to the Apache web server.
Web server Nginx
Nginx quickly provide static content with efficient use of system resources. It can deploy HTTP dynamic content on the network using a Fast CGI handler for the script, and can function capable software load balancing.
IIS Web server
Is a continuation of the Internet Information Service (IIS) is a component that can be used to manage web, file transfer protocol (FTP), Ghoper, and NNTP.

2. Proxy Server

Proxy server is a server computer or a computer program that can act as other computer to make requests to the content from the Internet or intranet. Proxy servers act as a gateway in the world for each client computer. Proxy servers can be used to secure private network that is connected to a public network. Proxy servers have many uses of the router that features packet filtering because the proxy server is operating at a higher level and have a thorough control of the access network. Here are some uses of the proxy server
Connection Sharing
filtering and
Chacing
3. DHCP (Dynamic Host Configuration Protocol)

Dynamic host configuration protocol (DHCP) is a protocol-based client / server architecture in use to facilitate the allocation of IP addresses in the network. If the local network does not use DHCP to assign IP addresses to all computers manually. And if DHCP is in use on the local network, then automatically any connected computer in the network will obtain IP. On a vast network, DHCP is used to simplify and eliminate the possibility of conflicts among the IP.

4. DNS Server

Or the DNS (domain name system) is a service to provide information to translate host names (domain) to address IP address Addressing. Domain name system or in short DNS could be portrayed if a client browsing to address specific domains do first is to ask to the machine DNS, and DNS would inform the client of the IP address destination server as on the internet only known IP addressing Addressing. For example, when you write www.yahoo.com in a browser, the DNS will automatically switch to the www.yahoo.com domain ip 192.211.48.254, well that functions DNS or domain name system.

5. FTP (File Transfer Protocol)

FTP is one of the protocols on the Internet that allows Internet users to exchange and file transfer via an internet server. Via FTP, you can easily access, upload, donwload, and manage files in the Internet server easily. FTP servers are generally divided into two anonymous FTP and FTP authenticate. In anonymous, you are free to access the FTP server by using the "username" and password in the form of anonymous email address. At authenticate FTP, you can not or banned access the FTP server if you do not have a username and password to the server.

6. VPN (Virtual Private Network)

VPN is a secure connection between two segments of a private network that is in use on a public network such as the Internet to reduce operating costs. Both segments are connected via a public network. To be able to secure the network in it, wear two VPN tunneling and encryption technology namely.