Double unidirectional isolation switching method based on optical fiber communication
A fiber optic communication, dual-unidirectional technology, applied in the direction of data exchange through path configuration, optical fiber transmission, data exchange network, etc., to achieve good security performance and improve security
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[0040] The present invention is described in further detail now in conjunction with accompanying drawing.
[0041] Firstly, a fiber-based one-way shutter is introduced. Such as figure 1 As shown, ordinary optical fiber cards cannot work with a single fiber. Under normal circumstances, the optical fiber network card must be plugged with two optical fibers at the same time, and its interface status can be UP. Two-way communication is required to confirm the connection, namely: 1. SYN=j; 2. ACK=j+1; 3. SYN+ACK=k; 4. ACK=k+1.
[0042] The one-way channel of the one-way optical gate uses single fiber + signal simulation technology, so that even if only one fiber is inserted between the fiber cards, it can be in the Linked mode, that is, the optical card can also work in the Linked state when a single fiber is connected, and the network interface can be Normal UP. At the same time, the signal simulation technology is used to support the protocol to complete operations such as rat...
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