352-001 · Question #750
Which design advantage of Ethernet VPN over VPLS is true?
The correct answer is D. increased PE scalability. The correct answer is (D) increased PE scalability. EVPN uses BGP as its control plane to distribute MAC and IP reachability information, replacing VPLS's flood-and-learn approach. In VPLS, every PE must flood unknown unicast, broadcast, and multicast traffic to all other PEs…
Question
Which design advantage of Ethernet VPN over VPLS is true?
Options
- Amultitenancy support
- Bnative support for multihoming with per-VLAN load balancing
- Csupport of legacy protocols such as IPX
- Dincreased PE scalability
How the community answered
(25 responses)- A4% (1)
- D96% (24)
Explanation
The correct answer is (D) increased PE scalability. EVPN uses BGP as its control plane to distribute MAC and IP reachability information, replacing VPLS's flood-and-learn approach. In VPLS, every PE must flood unknown unicast, broadcast, and multicast traffic to all other PEs in the same instance, which grows poorly as the network scales. EVPN eliminates the need for flooding by advertising MAC/IP bindings via BGP, dramatically reducing the burden on Provider Edge (PE) routers and improving scalability. While EVPN also supports multihoming with per-VLAN load balancing (B), that is a correct advantage of EVPN but it is not listed as the right answer here - the exam is testing whether you know that scalability (via BGP control-plane MAC learning) is the primary architectural improvement EVPN brings over VPLS. Multitenancy (A) and legacy protocol support (C) are not distinguishing advantages of EVPN over VPLS.
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