ISC Identity And Access Management Architecture Practice Question
When migrating to a Zero Trust architecture, what is the recommended approach for legacy applications that do not support modern authentication protocols (SAML/OIDC)?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an Identity-Aware Proxy (IAP).
An Identity-Aware Proxy (IAP) can act as a modern authentication frontend for legacy apps, handling the modern auth flow and passing the identity to the backend via headers or Kerberos.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Only allow access via VPN.
Why it's wrong here
VPNs are often discouraged in Zero Trust as they provide excessive network-level access.
- ✗
Rewrite the application source code.
Why it's wrong here
While possible, it is rarely the recommended initial approach.
- ✓
Use an Identity-Aware Proxy (IAP).
Why this is correct
IAP is the standard method for wrapping legacy apps in a modern ZT architecture.
- ✗
Disable authentication for these apps.
Why it's wrong here
This creates a severe security vulnerability.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.