350-601 Security Practice Question
A customer is deploying Cisco ACI with a requirement to isolate tenant traffic in a multi-tenant environment. They want to ensure that a tenant admin can only manage their own tenant's objects. Which RBAC configuration should be implemented?
⚠ Common exam trap
Cisco often tests the distinction between network-level segmentation (e.g., VRFs) and administrative-level isolation (e.g., security domains), and the trap here is that candidates mistakenly choose VRF-based isolation for RBAC, not realizing that VRFs only separate data plane traffic, not management access.
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
✓
Create a security domain for each tenant and assign the 'tenant-admin' role to the user within that domain.
Cisco ACI uses security domains to enforce Role-Based Access Control (RBAC) boundaries. By creating a security domain for each tenant and assigning the 'tenant-admin' role to a user within that domain, the tenant admin is restricted to managing only the objects (e.g., EPGs, contracts, policies) that belong to that specific tenant. This ensures isolation of tenant traffic management in a multi-tenant environment without granting global or cross-tenant privileges.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign the 'read-only' role to the user within the tenant.
Why it's wrong here
Read-only does not allow management.
- ✗
Create a separate VRF for each tenant and assign admin to that VRF.
Why it's wrong here
VRF is for network isolation, not RBAC.
- ✓
Create a security domain for each tenant and assign the 'tenant-admin' role to the user within that domain.
Why this is correct
Security domains limit the scope of roles to specific tenants.
- ✗
Assign the 'tenant-admin' role to the user globally.
Why it's wrong here
Global role gives access to all tenants.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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