Based on the exhibit, which of the following is a viable option for the Path Computation Element (PCE) to obtain all the necessary topology and traffic-engineering information from the network, so that it can calculate LSP paths on behalf of the PE routers?
The Path Computation Element (PCE) requires comprehensive topology and traffic-engineering information from the network. To achieve this, establishing BGP sessions using the BGP-LS address family with routers in both IGP areas, specifically routers R3 and R4, would provide the PCE with a complete view of the network. This approach ensures that the PCE can gather all necessary data to calculate Label Switched Path (LSP) paths for the PE routers.
correct
BGP-LS or IGP connections need to include routers in both areas and backbone. IGP has to be direct BGP-LS can be routed.