350-501 Aliasing Practice Question
When deploying EVPN with SR-MPLS or SRv6, which THREE statements about EVPN multi-homing and related concepts are correct? (Choose three.)
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
✓
EVPN IRB (Integrated Routing and Bridging) enables both Layer 2 and Layer 3 forwarding over the same EVPN instance using an anycast gateway.
The three correct statements about EVPN multi-homing are A, B, and E. EVPN IRB does use an anycast gateway for Layer 3 forwarding. Aliasing allows forwarding based on ESI knowledge even without learning the specific MAC address. Designated Forwarder (DF) election is performed per (ESI, VLAN) to avoid duplicate traffic. Option C is incorrect because the Ethernet Segment Identifier (ESI) is used for identifying multi-homed sites and DF election, but split-horizon filtering is achieved through the ESI label, not the ESI itself. Option D is incorrect because EVPN VPWS is a point-to-point service only.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
EVPN IRB (Integrated Routing and Bridging) enables both Layer 2 and Layer 3 forwarding over the same EVPN instance using an anycast gateway.
Why this is correct
Correct. IRB provides L2 and L3 with anycast gateway.
- ✓
Aliasing allows a PE to forward traffic to a multi-homed site even if it has not learned the MAC address, based on the ESI knowledge.
Why this is correct
Correct. Aliasing uses ESI to forward.
- ✗
The Ethernet Segment Identifier (ESI) is a unique identifier for a multi-homed site, used to detect multi-homing and for split-horizon filtering.
Why it's wrong here
Split-horizon filtering is performed using the ESI label, not the ESI itself. The ESI is used for identification and DF election.
- ✗
EVPN VPWS (Virtual Private Wire Service) uses a single EVPN instance for both point-to-point and multipoint services.
Why it's wrong here
Incorrect. EVPN VPWS is point-to-point only.
- ✓
Designated Forwarder (DF) election is performed per (ESI, VLAN) to avoid duplicate traffic from multiple PEs to the CE.
Why this is correct
Correct. DF per VLAN prevents duplicates.
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 350-501 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 350-501 exam.