A chain of command is the formal line of authority that defines who can direct actions, grant approvals, and take responsibility for decisions. In cyber security, it determines who may authorize account lockouts, system shutdowns, threat containment, public disclosure, or escalation to legal and law-enforcement teams. A clear chain of command helps avoid duplicate instructions, delays, and conflicting responses when an incident is unfolding.
This matters because cyber attacks often exploit confusion as much as technical weakness. If staff do not know who can approve a response, attackers can gain more time to move laterally, exfiltrate data, or destroy evidence. In defense operations, a well-defined chain also supports accountability: analysts, managers, and commanders know where decisions sit and how to report them. Strong organizations document this structure in incident response plans, so action can move quickly without losing control.