Home » Cisco » 642-889 » Which Layer 2 VPN technology is implemented over an IP core network without the need for MPLS?
Which Layer 2 VPN technology is implemented over an IP core network without the need for MPLS?
A. VPLS
B. VPWS
C. AToM
D. L2TPv3
Correct Answer: D
Explanation/Reference:
Explanation:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtl2tpv3.html#wp1040784 The Layer 2 Tunnel Protocol Version 3 feature expands on Cisco support of the Layer 2 Tunnel Protocol Version 3 (L2TPv3). L2TPv3 is an Internet Engineering Task Force (IETF) l2tpext working group draft that provides several enhancements to L2TP for the capability to tunnel any Layer 2 payload over L2TP.
Specifically, L2TPv3 defines the L2TP protocol for tunneling Layer 2 payloads over an IP core network using Layer 2 virtual private networks (VPNs).
Benefits of this feature include the following:
.L2TPv3 simplifies deployment of VPNs
.L2TPv3 does not require Multiprotocol Label Switching .L2TPv3 supports Layer 2 tunneling over IP for any payload
