350-601 Security Practice Question
A data center administrator is implementing Cisco TrustSec on a Nexus 7000 switch to enforce role-based access control. After configuring a security group tag (SGT) classification policy, users report that traffic between two servers is not being tagged. What is the most likely cause?
⚠ Common exam trap
Test-takers frequently assume SGT classification is automatic once a policy is defined, but Cisco explicitly tests that the ingress interface must have the 'sgt' or 'ip policy' command to trigger classification.
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
✓
The ingress interface is missing the 'sgt' or 'ip policy' command to classify traffic.
Cisco TrustSec requires the ingress interface to be explicitly configured with either the 'sgt' command (for static SGT assignment) or an 'ip policy' command (for dynamic SGT classification via a security group ACL). Without this, the switch cannot classify traffic and apply the SGT tag. The scenario describes a classification policy that is not being applied, which directly points to a missing ingress classification command.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DHCP snooping is not enabled on the VLAN.
Why it's wrong here
DHCP snooping is unrelated to SGT classification.
- ✓
The ingress interface is missing the 'sgt' or 'ip policy' command to classify traffic.
Why this is correct
Ingress interface must have 'sgt' or 'ip policy' to assign SGTs.
- ✗
The switch ASIC does not support TrustSec in hardware.
Why it's wrong here
Nexus 7000 generally supports TrustSec in hardware.
- ✗
The SGT is assigned on the egress interface instead of ingress.
Why it's wrong here
SGT classification happens on ingress.
Visual reference
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 |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco 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 350-601 exam.