CIRT
Computer Incident Response Team
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A CIRT is an organization's designated team for investigating and containing security incidents, from malware outbreaks to data breaches. The name is used interchangeably with CSIRT; some groups just swap 'incident' for 'security' with no real difference in mission: detect, contain, eradicate, recover, and learn. Knowing the term matters because policies, job postings, and frameworks pick one label or the other for the same function.