ISC Security Architecture Modeling Practice Question
When designing a secure API architecture, which pattern is the industry standard for securing inter-service communication?
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
✓
mTLS
mTLS (mutual TLS) ensures that both parties in a connection verify each other's identity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
API Keys
Why it's wrong here
Insufficient for secure service-to-service communication.
- ✗
IP Whitelisting
Why it's wrong here
Too static for cloud-native architectures.
- ✓
mTLS
Why this is correct
mTLS provides robust cryptographic identity for services.
- ✗
Basic Auth
Why it's wrong here
Insecure and outdated.
About these practice questions
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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.