Research And Application Of NAT Traversal Technology Based On Hybrid P2P Network

The rapid development of Internet technology has put forward higher requirements to the computing power and bandwidth, which depend on a few servers in traditional Internet technology. Peer-to-Peer (P2P) networks technology can use the computing power and network bandwidth of the participants effectively, instead of entirely dependenting on the servers, which breaks the traditional C/S mode:some provide services and the other receive services. P2P networks are fully distributed system and the relationship of the nodes in the networks is completely equal, compared to the traditional C/S architecture. All tasks are completed by the collaboration of the nodes in the P2P networks. Therefore, the P2P technology can improve the computing power and the utilization of network bandwidth effectively. As a result of this, the P2P technology has been widely used in the current Internet, and 50% to 80% of the traffic comes from the P2P programs.However, there are still some shortcomings of the P2P technology, in which the biggest one is that the NAT prevents the connection request of the external network host, so that most of the P2P programs can only communicate within the LAN. In order to solve this problem, this paper attempts to study the hybrid P2P network based on NAT traversal technology, tries to overcome the deficiencies of P2P technology, and further enhances the computing power and network bandwidth. Based on the ICE technology, this paper integrates the direct connection of STUN and the transfer connection of TURN, proposes an interactive NAT traversal solution and applies to the actual developed remote tutoring system. The successful application of remote tutoring system verifies the effectiveness of the proposed NAT traversal in this paper.