Which of these statements accurately describes MPLS-based L3VPN service?

Transparent routing (layer 2 forwarding without IP route participation) is a characteristic of L2VPN technologies such as VPLS or Ethernet pseudowires, not L3VPN which terminates at Layer 3 on the PE.

In an MPLS BGP/MPLS IP VPN (RFC 4364), the service provider's PE routers participate in the customer routing domain by maintaining VRF tables and distributing VPN routes between sites using MP-BGP with VPNv4 address families. This offloads inter-site routing from the customer - CE routers only need a single peering with the local PE, and the SP core handles all routing between customer sites.

MPLS L3VPN is not protocol-independent - it is specifically IP-based, requiring MP-BGP for VPN route distribution and IP routing within VRFs on the PE routers.

MPLS L3VPN does not inherently improve or enhance routing protocols or convergence times - it provides a VPN overlay service but does not modify the behavior or performance of the underlying routing protocols.