Network Security — Revision Notes

⚡ 30-Second Revision

Checked 18 October 2026.
NIST CSF 2.0 (2024): Govern, Identify, Protect, Detect, Respond, Recover.
Authentication = identity; authorisation = permission.
CERT-In: IT Act 70B; NCIIPC: 70A.
Encryption does not cure excessive access.

2-Minute Revision

Inventory assets and dependencies before assigning controls. Separate identity, permissions and data protection. Segment networks to limit spread, monitor events with a response process and test restoration rather than merely owning backups. Assess confidentiality, integrity and availability together. International guidance and Indian statutory institutional roles are different kinds of authority.

5-Minute Revision

Classify unauthorised disclosure, altered records and a portal outage by their primary security objective. Explain how a valid login can still have excessive permissions. Draft a five-step response-and-recovery outline for a hypothetical service outage, stating who validates restoration before normal access resumes.

Vyyuha Quick Recall

GIPDRR: Govern responsibility; Identify assets; Protect access; Detect events; Respond to incidents; Recover services.