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Once a virus has spread on a system, what does a security professional do in order to identify the infection?
Quarantine the affected hosts
Perform an integrity checking with checksums
Run full disk encryption on the infected hosts
Apply security patches on all outdated application
Perform an integrity checking with checksums is one a the three things to do to detect viruses on a system. The other two are Scanning the system and Intercept viruses based on a virus signature. EDIT: I don't understand how quarantining is not the most important in this list. You absolutely have to do that before you start scanning and cleaning. EDIT: i certainly agree with the second comment, Quarantining is the most important step.
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