Quick Answer
The answer is Internet access for customers and IP transit services. These are correct because MPLS L3VPN operates at Layer 3 of the OSI model, using separate VRF instances or the global routing table to provide routed IP connectivity between customer sites and external networks like the Internet. On the Cisco SPCOR / CCNP Service Provider Core 350-501 exam, this question tests your ability to distinguish L3VPN service offerings from L2VPN features; a common trap is confusing transport services like Ethernet frame forwarding or Layer 2 bridging, which belong to VPLS or AToM, not L3VPN. Remember that L3VPN is about IP routing and policy-based connectivity, not switching or encapsulation. A useful memory tip: “L3VPN = IP routes and Internet; L2VPN = bridges and frames.”
This 350-501 practice question tests your understanding of services. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are services that can be offered using MPLS Layer 3 VPN (L3VPN) technology? (Select two.)
IP transit services
L3VPN provides IP routing between sites.
Layer 2 bridging between sites
Why wrong: This is L2VPN, not L3VPN.
Transport of Ethernet frames over MPLS
Why wrong: This is VPLS or VPWS.
Native multicast support without tunnels
Why wrong: Multicast is a feature within L3VPN, not a service itself.
Internet access for customers
L3VPN can provide Internet via default route or separate VRF.
Answer choices
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
Options A and C are correct. MPLS L3VPN provides Layer 3 connectivity between customer sites; Internet service can be provided via separate VRF or global table; IP transit is a typical Layer 3 service. Option B (Layer 2 bridging) is for L2VPN/VPLS. Option D (Transport of Ethernet frames) is L2VPN. Option E (Multicast support) is possible but is a feature, not a service itself.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
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.
Related concept
Static NAT maps one inside address to one outside address.
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.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-501 NAT questions on configuration and troubleshooting.
Services — study guide chapter
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Services practice questions
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Cisco SPCOR / CCNP Service Provider Core 350-501 study guide
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FAQ
Services — This question tests Services — Static NAT maps one inside address to one outside address..
The correct answer is: IP transit services — Options A and C are correct. MPLS L3VPN provides Layer 3 connectivity between customer sites; Internet service can be provided via separate VRF or global table; IP transit is a typical Layer 3 service. Option B (Layer 2 bridging) is for L2VPN/VPLS. Option D (Transport of Ethernet frames) is L2VPN. Option E (Multicast support) is possible but is a feature, not a service itself.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 350-501 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
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