IT

Users, groups, OUs — and the specific order you offboard someone to avoid leaving a hole.

SAML and OIDC — how the SP trusts the IdP to vouch for users, and the four ways that trust breaks.

Pick factors that survive real attackers — not just the compliance checkbox.

MDM, policy push, and the compliance report that gates corp access.

Read the header, not the branding — SPF, DKIM, DMARC, and a triage queue.

Priority vs severity, SLA clocks, and the triage questions that separate one-line tickets from hours of guesswork.

Codified steps beat panicked improvisation — walk the tree, don't guess.

Share ACLs, filesystem ACLs, deny beats allow — resolve the effective permission.

3-2-1, restore drills, and why offline copies beat ransomware.

Schedule risky work around the freezes — with rollback in hand.

From perimeter to request — when to trust the tunnel.

Provision the new hire without over-buying or under-buying.

Certs expire. Watch the fleet and renew before users notice.

Walk the OSI stack — ping, dig, curl, tcpdump — and pin the broken layer.