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Basic Concept of Proxy.
Proxies can be understood as a third party who stands in the middle between the two parties that are interconnected and function as an intermediary, such that the first party and second party is not directly related, but are each associated with an intermediary, namely the Proxy.
Proxy server has three main functions :
* Connection Sharing
* Filtering
* Caching
Proxy in a sense as an intermediary, working in different types of network communication protocols and can be at different levels in the hierarchy of the network communication protocol layer. An intermediary can only work on the Data-Link layer, Network layer and Transport layer, Application layer and communication layer in the hierarchy according to the OSI network. But the notion is largely a proxy server to appoint a proxy server that works as an application layer, although it will also be discussed about the proxy at the circuit level.
In a local network connected to another network or the Internet, users do not directly relate to the external network or the Internet, but must pass through a gateway, which acts as the boundary between the local network and outside networks. Gateway is very important, because the local network must be well protected from the dangers that may come from the internet, and it will be difficult Bial no clear boundary lines of local networks and the Internet.
Gateway also acts as the point where the number of connections from local users will be connected to him, and a connection to the outside network is also connected to him. Thus, the connection of local networks to the Internet will use a connection that is owned by the gateway together (connection sharing). In this case, the gateway is also a proxy server, as it provides services as an intermediary between the local network and outside networks or the Internet.
Proxies can be understood as a third party who stands in the middle between the two parties that are interconnected and function as an intermediary, such that the first party and second party is not directly related, but are each associated with an intermediary, namely the Proxy.
Proxy server has three main functions :
* Connection Sharing
* Filtering
* Caching
Proxy in a sense as an intermediary, working in different types of network communication protocols and can be at different levels in the hierarchy of the network communication protocol layer. An intermediary can only work on the Data-Link layer, Network layer and Transport layer, Application layer and communication layer in the hierarchy according to the OSI network. But the notion is largely a proxy server to appoint a proxy server that works as an application layer, although it will also be discussed about the proxy at the circuit level.
In a local network connected to another network or the Internet, users do not directly relate to the external network or the Internet, but must pass through a gateway, which acts as the boundary between the local network and outside networks. Gateway is very important, because the local network must be well protected from the dangers that may come from the internet, and it will be difficult Bial no clear boundary lines of local networks and the Internet.
Gateway also acts as the point where the number of connections from local users will be connected to him, and a connection to the outside network is also connected to him. Thus, the connection of local networks to the Internet will use a connection that is owned by the gateway together (connection sharing). In this case, the gateway is also a proxy server, as it provides services as an intermediary between the local network and outside networks or the Internet.