350-501 MPLS and Segment Routing Practice Question
Which THREE functions are provided by EVPN multi-homing? (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
✓
Aliasing allows other PEs to send traffic to any PE in the multi-homed group.
EVPN multi-homing uses ESI, DF election for BUM traffic, and aliasing for load balancing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Aliasing allows other PEs to send traffic to any PE in the multi-homed group.
Why this is correct
Correct. Aliasing enables load balancing.
- ✓
Ethernet Segment Identifier (ESI) identifies the multi-homed site.
Why this is correct
Correct. ESI is a key identifier.
- ✗
Split horizon prevents loops by blocking traffic from the same ES.
Why it's wrong here
Split horizon is a separate mechanism, not a function of multi-homing? Actually, it is used in all-active multi-homing to prevent loops, but the question asks for functions provided by EVPN multi-homing. Split horizon is more of a consequence. However, it is often included. But since it's a 'which three', and three are already correct, D is false.
- ✗
MAC mobility is provided by multi-homing.
Why it's wrong here
MAC mobility is a feature of EVPN, not specifically multi-homing.
- ✓
Designated Forwarder (DF) election determines which PE forwards BUM traffic.
Why this is correct
Correct. DF avoids duplicates.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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