Which router in the MPLS L3 VPN network is responsible for applying the RD to and IPv4 prefix?
- P router
- Core router
- CE router
- Backbone router
- PE router
Explanation: The Provider Edge (PE) router is responsible for customer route propagation across the MPLS VPN network. When the PE router receives an IPv4 routing update from a CE router, it prepends a 64-bit Route Distinguisher (RD) to the prefix to create a globally unique 96-bit VPNv4 address. P routers and CE routers do not participate in this process; P routers are unaware of VPN routes, and CE routers run standard IP software.
Related exam: Checkpoint Exam: MPLS and VPN Technologies
