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Question No. 1

When using H-VPLS, the PE router may use an IRB interface. How many VLAN tags can be processed by an IRB?

Answer: A

Question No. 2

Refer to the exhibit.

PE1 and PE2 are advertising the same subnet and export route-target to PE3. Which PE advertised subnet is installed at the PE3 BGP table?

Answer: C

Question No. 3

Implementing H-VPLS instead of VPLS reduces which requirement?

Answer: A

Question No. 4

Which two Layer 2 VPN methods support interworking between customer sites with different Layer 2 encapsulation at each end (for example, Frame Relay to Ethernet interworking)? (Choose two.)

Answer: A, D

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

Cisco Any Transport over MPLS (AToM) is a solution for transporting Layer 2 packets over an MPLS backbone. It enables Service Providers to supply connectivity between customer sites with existing data link layer (Layer 2) networks via a single, integrated, packet-based network infrastructure: a Cisco MPLS network. Without separate networks that each have network management environments, Service Providers can deliver Layer 2 connections over an MPLS backbone.

Cisco AToM provides a common framework to encapsulate and transport supported Layer 2 traffic types over an MPLS network core. Service Providers can use a single MPLS network infrastructure to offer connectivity for supported Layer 2 traffic and for IP traffic in Layer 3 VPNs.

Question No. 5

Which technology does an N-PE most likely use to pass traffic to the U-PE that is destined for the access switch?

Answer: A

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