Which of the following are valid Cisco Express Forwarding (CEF) operation modes? (Choose two.)

Central CEF mode is where the router's Route Processor (RP) handles all CEF operations, including forwarding information base (FIB) and adjacency table lookups. This is typical for routers without line cards or when line cards lack CEF capabilities. Distributed CEF mode (dCEF) offloads CEF operations to individual line cards. Each line card maintains its own copy of the FIB and adjacency table, allowing for faster packet forwarding as the RP is not involved in every packet decision. Dense CEF mode and Sparse CEF mode are not valid CEF operation modes; these terms are associated with IP Multicast forwarding. Routed CEF mode is not a standard CEF operation mode.