| VPN offers a cheap and safe solution for the corporations to communicate withtheir branches in different areas or with other corporations. But the bandwidth of thenetwork is reduced, to some extent, because the data are encapsulated and encryptedfor security. While what VPN bears is for the interior applications including a lot ofbandwidth applications such as file transmission, video conferences and so on, whichrequire a high speed. Besides, the speed of these applications greatly influences theefficiency of the corporation.On this condition, we hope to provide a kind of VPN to improve the bandwidth.Therefore we adopt two ways, one of which is to compress the transmission data byCompress algorithms high-efficiently, the other of which is to increase the bandwidthby binding multi-network-card. This low-cost solution can evidently improve thecapability of the network and it can also decrease the failure of the VPN server causedby the failure of linking to the net.In the thesis I mainly talk about how to realize the binding ofmulti-network-card.First of all, I make a study and discussion on protocols , that is TCP/IP includingits data frame and data encapsulation technique. This is the preparation for theoperation on data wrap.Second, as for the discussion about the related technique of the NDIS, I mainlydiscuss the structure and use of the mesosphere driver and the main technique fordeveloping the mesosphere driver. And I put the important part of discussion on thesupport of NDIS on the balanced load, which is the foremost technique of realizingthe binding of the multi-network-card.Third, in the thesis I present a realization of binding the double network card,namely MNIC. Furthermore I list the important data framework and code and it wastested and proved to have practical effect. This offers the practical reference to thefurther research on the binding of multi-network-card. In the end, I summarize the whole research work in my thesis, and make anexpectation to the future research. |
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