Servers

Proxy server (proxy server) is a computer server or a computer program that can act as another computer to make requests for content from the Internet or an intranet.
Proxy Server acts as a gateway to the world of the Internet to every client computer. Proxy server is invisible to the client computer: a user who interacts with the Internet via a proxy server will not know that a proxy server is handling requests are done. Web server that receives requests from the proxy server will interpret the request-the request as if the request came directly from the client computer, instead of the proxy server.
Proxy servers can also be used to secure private network that is connected to a public network (like internet). Proxy servers have more functionality than a router that features packet filtering because it is a proxy server to operate at a higher level and have a more comprehensive control of network access. Proxy server that functions as a "security agent" for a private network, commonly known as a firewall.

Web server is a server software that functions accept HTTP or HTTPS requests from clients, known as a web browser and sends the results back in the form of web pages are typically in the form of an HTML document. Popular web servers such as Apache and Microsoft Internet Information Services (IIS). Apache is a cross-platform web server, while IIS can only operate in Windows operating systems.

FTP (short for File Transfer Protocol) is an Internet protocol that is running in application layer which is a standard for transferring files (files) the computer between the machines in an internetwork.
FTP is one of the earliest Internet protocol was developed, and is still used today to perform the download (download) and penggugahan (upload) files between your computer and FTP server FTP client. An FTP Client is an application that can issue commands FTP to an FTP server, while the FTP server is a Windows service or daemon that runs on a computer that responds to commands from an FTP client. FTP Commands can be used to change directories, change the transfer mode between binary and ASCII, evocative computer file to the FTP server and download files from FTP servers.
DNS (Domain Name System, the Indonesian language: Domain Name System) is a system that stores information about host name or domain name in the form of scattered databases (Distributed databases) in a computer network, such as the Internet. DNS provides the IP address for each host name and record each letter transmitting server (the mail exchange server) receive electronic mail (email) for each domain.
DNS provides an important service to the Internet, where computer and network hardware work with IP addresses to perform tasks such as addressing and routing (routing), humans in general prefer to use the host name and domain name, for example, is the appointment of a universal source (URL ) and e-mail address. Control link to this need.