Question 1 of 30
In a service provider environment, a network engineer is tasked with designing a Layer 3 VPN solution for multiple customers. Each customer requires their own isolated routing table, and the engineer must ensure that the VPNs can scale efficiently while maintaining security and performance. Given that the service provider uses MPLS as the underlying transport mechanism, which of the following configurations would best support the requirements for customer isolation and scalability in a Layer 3 VPN setup?
Implementing Virtual Routing and Forwarding (VRF) instances for each customer, utilizing MPLS labels to segregate traffic and applying route distinguishers (RDs) to ensure unique routing tables for each VRF.
Configuring a single routing table for all customers and using access control lists (ACLs) to filter traffic based on source and destination IP addresses.
Establishing a separate physical network for each customer to ensure complete isolation and prevent any potential traffic leakage between customers.
Utilizing a single MPLS label for all customer traffic and relying on Quality of Service (QoS) policies to manage bandwidth allocation among customers.

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