Select two purposes of configuring the IPv4 and VPNv4 address-families in an MPLS Layer 3 VPN.

Configuring the IPv4 and VPNv4 address-families in an MPLS Layer 3 VPN serves two key purposes. First, the Route Distinguisher (RD) is prepended to the IPv4 route, making it unique within the MPLS VPN backbone. This allows multiple customers to use the same private IPv4 address space without conflicts. Second, the VPNv4 address-family is used to advertise the MPLS VPN label. This label is crucial for forwarding traffic within the MPLS network, allowing Provider Edge (PE) routers to direct customer traffic to the correct destination without needing to perform IP lookups in the core. The statement about the VPNv4 address consisting of a 64-bit RD prepended to the IPv4 prefix is incorrect; the RD is 64 bits, but the VPNv4 address is a 96-bit value (64-bit RD + 32-bit IPv4 prefix). MP-BGP allows overlapping addresses, but this isn't a direct purpose of configuring the address-families themselves. The IPv4 address is not used to tag the MPLS label; the label is assigned and advertised by the VPNv4 address-family.