350-501 Networking Practice Question
A network administrator is designing an MPLS TE tunnel for a service provider backbone. The goal is to provide bandwidth protection for voice traffic. Which MPLS TE feature should be configured?
⚠ Common exam trap
Cisco often tests the distinction between features that provide path selection (Path-option) or traffic steering (Autoroute announce) versus features that provide actual failure protection (FRR), leading candidates to confuse 'bandwidth protection' as a separate feature rather than a benefit of FRR.
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
✓
Fast Reroute (FRR)
MPLS TE Fast Reroute (FRR) provides sub-50 ms protection against link or node failures by pre-computing and pre-signaling a backup tunnel that bypasses the protected element. This meets the requirement for bandwidth protection of voice traffic, which is sensitive to packet loss and delay during network convergence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Autoroute announce
Why it's wrong here
Autoroute announces the tunnel as a directly connected interface to IGP.
- ✗
Path-option
Why it's wrong here
Path-option defines the path for the tunnel.
- ✓
Fast Reroute (FRR)
Why this is correct
FRR provides backup LSPs to protect against link or node failures.
- ✗
Bandwidth protection
Why it's wrong here
Bandwidth protection is not a specific MPLS TE feature.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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