Question

Which three statements about AToM are true?

A.	It supports interworking for Frame Relay, PPP, and Ethernet, but not ATM.
B.	It requires Layer 3 routing between the PE and CE router.
C.	It requires MPLS between PE routers.
D.	The attachment circuit is configured with the xconnect command.
E.	The PE routers must share the same VC identifier.
F.	IP CEF should be disabled on the PE routers.

previous question

next question

Accepted Answer

It requires MPLS between PE routers.

Accepted Answer

The attachment circuit is configured with the xconnect command.

Accepted Answer

The PE routers must share the same VC identifier.

Accepted Answer

Any Transport over MPLS (AToM) transports data link layer (Layer 2) packets over a Multiprotocol Label Switching (MPLS) backbone. AToM enables service providers to connect customer sites with existing Layer 2 networks by using a single, integrated, packet-based network infrastructure—a Cisco MPLS network. Instead of using separate networks with network management environments, service providers can deliver Layer 2 connections over an MPLS backbone. AToM provides a common framework to encapsulate and transport supported Layer 2 traffic types over an MPLS network core.

AToM supports the following like-to-like transport types:
- ATM Adaptation Layer Type-5 (AAL5) over MPLS
- ATM Cell Relay over MPLS
- Ethernet over MPLS (VLAN and port modes)
- Frame Relay over MPLS
- PPP over MPLS
- High-Level Data Link Control (HDLC) over MPLS