300-320 · Question #682
Which of the following offers high bandwidth and scalable Layer 2 WAN connectivity?
The correct answer is C. VPLS. VPLS (Virtual Private LAN Service) is an MPLS-based Layer 2 VPN technology that emulates an Ethernet LAN across a wide-area network. It supports high-bandwidth transport over an MPLS backbone and can interconnect many sites within the same bridged domain. VPWS (Virtual Private…
Question
Which of the following offers high bandwidth and scalable Layer 2 WAN connectivity?
Options
- AVPWS
- BFrame Relay
- CVPLS
- DL2TPv3
How the community answered
(31 responses)- A3% (1)
- C94% (29)
- D3% (1)
Explanation
VPLS (Virtual Private LAN Service) is an MPLS-based Layer 2 VPN technology that emulates an Ethernet LAN across a wide-area network. It supports high-bandwidth transport over an MPLS backbone and can interconnect many sites within the same bridged domain. VPWS (Virtual Private Wire Service) is point-to-point only and does not scale as well for multi-site Layer 2 connectivity. Frame Relay is a legacy technology with limited bandwidth ceilings (typically sub-T1/E1 speeds). L2TPv3 tunnels IP-encapsulated Layer 2 frames but lacks the integrated traffic engineering and scalability inherent to MPLS-based VPLS.
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