350-601 Compute Practice Question
A UCS domain has two Fabric Interconnects in end-host mode. Which statement about server-side traffic is true?
⚠ Common exam trap
Candidates often confuse end-host mode with switching mode, assuming STP is required on server ports, when in fact end-host mode disables STP and relies on MAC learning to maintain a loop-free topology.
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 Fabric Interconnect learns server MAC addresses on the server-facing ports.
In end-host mode, the Fabric Interconnect (FI) acts as a Layer-2 forwarding device that learns server MAC addresses on the server-facing ports to build its forwarding table. This is required because the FI does not run Spanning Tree Protocol (STP) on those ports; instead, it relies on MAC learning to forward traffic correctly between servers and the upstream network.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Fabric Interconnects run IEEE 802.1D STP on the server-facing ports.
Why it's wrong here
End-host mode suppresses STP on server ports.
- ✓
The Fabric Interconnect learns server MAC addresses on the server-facing ports.
Why this is correct
Yes, it learns host MAC addresses.
- ✗
The Fabric Interconnect performs VLAN-based load balancing to the upstream network.
Why it's wrong here
Load balancing is typically MAC-based.
- ✗
Each Fabric Interconnect independently forwards frames to the upstream switches using the same uplink.
Why it's wrong here
FIs coordinate; only one FI forwards traffic for a given source.
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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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.