Rule of Internet is no more than 2 handle 3. The one of them is something where "leaving the terminal is made smart network as dam". In other words, the burden where network there does not know at all concerning the information which flows, processes the packet it is the case that it has been pushed to the server and the client. This architecture to be good functioning did from the birth of TCP/IP approximately over 30, but 30 years keep changing largely from this.
That former times, there were many legitimate reasons in designating network as the dam. As for the main reason, are network technology of that time and efficiency of the processor. At one time the Ethernet hub being very simple, had almost not considered in security. As for the rooter as for packet inspection of the level which only the efficiency which can send extremely the little cord/code it has, is deep even the concept it was not born.
But network started having intelligence. QoS, the fire wall and the layer 3 switch etc. security of TCP/IP network and made the improvement of performance possible.
It has been about that impetus probably will be given to making intelligent in today and the network where acceleration of evolution and the processor of network technology advances. When we assume that you inspect all packet between giga bit interface, should communicate do it should send traffic to some direction it can decide, it reached the point where at wire speed.
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