An incident response tabletop (A) is a structured scenario-based exercise where analysts practice decision- making, communications, evidence handling, and coordinated response under realistic constraints. In Proofpoint-focused IR, tabletops are particularly valuable because email-led incidents require cross-team handoffs: SOC triage (TAP), mail admin actions (policy changes, Smart Search validation), post-delivery remediation (TRAP quarantine/pull), identity containment (password resets, token revocation, MFA), and business escalation (finance verification for BEC). Tabletop drills validate that playbooks are executable, escalation contacts are correct, and the team can meet response SLAs (time-to-triage, time-to-contain). They also expose tooling gaps (missing mailbox audit logs, insufficient retention, lack of automation for retroactive search/pull). Updating SOPs is important but is documentation work, not a training exercise by itself.
Vulnerability scanning and port scanning are security assessment activities and can support overall security posture, but they do not train analysts on the incident response lifecycle behaviors (triage, containment coordination, post-incident lessons learned) that drive effective real-world response.