Network safety isolating card

Abstract

The security isolation card includes following parts: signal conversion circuit for converting input signal to above threshold voltage for logic circuit to recognize, converted signal is sent to signal latch unit; signal shaping and latch, shaped PCIRST# is output to enable end of latch; relay drive circuit magnifies latched signal and outputs the magnified signal to relay switching circuit; relay switching circuit switches signal based on control signal from the relay drive circuit. Using RESET signal in PCI bus slot related to hardware, power source and computer closely, the invention realizes network isolation function. Network can be switched before power on and restarts computer so as to overcome disadvantages of switching network after shutting down computer in prior art.

Description

technical field [0001] The invention relates to computer network management technology, in particular to a network safety isolation card used for network safety management. Background technique [0002] In recent years, the Internet has developed rapidly in our country, and its influence has penetrated into all aspects of people's life and work. While the Internet brings people the convenience of quickly obtaining information, the threat it poses to the user's network security has increasingly become a problem that people worry about. Especially for governments, enterprises and institutions, once their important data is leaked, the consequences will be disastrous. In the process of vigorously promoting information construction in our country, how to ensure the security of confidential information has become an important direction of technology research in the information field recently. So how to ensure the security of information transmission? In particular, how to prote...

AI Technical Summary

Problems solved by technology

This solution has many disadvantages. First, due to the use of data signals for counting, the switching of the relay is after the first few data exchanges, and a 2ms delay is required for the complete switching of the relay, resulting in the IDE controller on the main board. The hard disk information (depending on the hard disk connected to the internal and external network and the default hard disk of the system) will cause compatibility problems between the hard disk and the motherboard.

Secondly, the solution must be able to complete the switching function of the internal and external networks when the computer is powered off

Due to frequent power-off and power-on, the efficiency of the computer will be affected, and the service life of the hard disk will be shortened

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