350-501 Services Practice Question
Which TWO of the following are services that can be offered using MPLS Layer 3 VPN (L3VPN) technology? (Select two.)
⚠ Common exam trap
Cisco often tests the distinction between L3VPN and L2VPN services, so the trap here is that candidates confuse Layer 2 transport (Ethernet frames, bridging) with Layer 3 IP forwarding, leading them to select options B or C as valid L3VPN services.
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
✓
IP transit services
MPLS Layer 3 VPN (L3VPN) uses a peer-to-peer model where the provider edge (PE) router participates in the customer's routing via MP-BGP (RFC 4364). This allows the provider to offer IP transit services by carrying customer IP routes across the MPLS backbone, and Internet access by connecting the customer VRF to an Internet-facing VRF or global routing table. Both services rely on the L3VPN architecture's ability to separate and forward IP traffic based on VRFs and route targets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IP transit services
Why this is correct
L3VPN provides IP routing between sites.
- ✗
Layer 2 bridging between sites
Why it's wrong here
This is L2VPN, not L3VPN.
- ✗
Transport of Ethernet frames over MPLS
Why it's wrong here
This is VPLS or VPWS.
- ✗
Native multicast support without tunnels
Why it's wrong here
Multicast is a feature within L3VPN, not a service itself.
- ✓
Internet access for customers
Why this is correct
L3VPN can provide Internet via default route or separate VRF.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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