300-730 · Question #118
Refer to the exhibit. Based on the configuration output, what is the VPN technology?
The correct answer is C. L2VPN. The configuration output shows a Layer 2 VPN (L2VPN) technology, which operates at the data link layer to extend Layer 2 connectivity across a routed network.
Question
Options
- Asite-to-site
- BDMVPN
- CL2VPN
- Dmulticast VPN
How the community answered
(23 responses)- A4% (1)
- B4% (1)
- C91% (21)
Why each option
The configuration output shows a Layer 2 VPN (L2VPN) technology, which operates at the data link layer to extend Layer 2 connectivity across a routed network.
Site-to-site VPN uses IPsec tunnel mode to connect two networks at Layer 3, and its configuration shows crypto maps, transform sets, and access lists - not Layer 2 bridging constructs.
DMVPN is identified by mGRE tunnel interfaces and NHRP configuration, which enable dynamic spoke-to-spoke tunnels - not present in an L2VPN configuration.
L2VPN technologies such as VPLS, EoMPLS, or L2TPv3 are identified by configuration elements like xconnect statements, pseudowire encapsulation, or VPLS bridge-domains that indicate Layer 2 forwarding across an IP or MPLS core. These constructs are distinct from Layer 3 VPN configurations and signal that the tunnel is carrying Ethernet or other Layer 2 frames rather than routed IP traffic.
Multicast VPN uses MDT or mLDP profiles and VRF-based multicast routing configuration, which is unrelated to Layer 2 forwarding constructs seen here.
Concept tested: Identifying L2VPN technology from configuration output
Source: https://www.cisco.com/c/en/us/tech/ip/layer-2-vpns-l2vpn/index.html
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