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AN engineer is implementing MPLS OAM to monitor traffic within the MPLS domain. Which action must the engineer perform to prevent from being forwarded beyond the service provider domain when the LSP is down?
Correct Answer: B
MPLS OAM (Operations, Administration, and Maintenance) is used to monitor and troubleshoot MPLS networks. To prevent packets from being forwarded beyond the service provider domain when the LSP (Label Switched Path) is down, the destination address for the LSP echo request packet should be in the 127.x.y.z/8 network. This special address range is reserved for loopback and internal testing, ensuring that the packet does not leave the local network even if the LSP is not operational. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) v1.01.