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UDP P2P penetration
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NAT (Network Address Translators), network address translator: network address translation is produced under the increasing lack of IP addresses, its main purpose is to be able to address to reuse. NAT is divided into two major categories, basic NAT and NAPT (Network Address/Port Translator). Initially NAT is a function module that runs on the router. First is a basic NAT, its production is based on the following facts: a private network (domain) need only a few nodes in the node with Internet connection (hehe, this was in the mid 90 's). In fact, only a small number of nodes in this subnet requires a globally unique IP address, IP address of the other node should be able to reuse. Therefore, the basic NAT functionality is very simple, in the IP subnet subnet using a reserved section, the IP is not visible outside. Only a handful of IP addresses within the subnet can correspond to a truly global a unique IP address. If they need to acc
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