Refer to the exhibit. EIGRP is running between routers R5 and R1, and OSPF is used in the rest of the network. Users in a network attached to router R3 need to access a server connected to R5. Which…

To allow specific network access (R3 to R5 server) across different routing protocols (EIGRP and OSPF) while precisely controlling which routes are advertised, redistribution must be configured on R1. Route maps are the most effective and flexible tool to filter specific routes during redistribution, ensuring only the necessary routes (e.g., the server's network on R5) are shared into OSPF and no other unwanted EIGRP networks are advertised.

An offset list modifies the metric of a route to influence path selection but does not filter routes from being advertised or redistributed entirely.

An OSPF virtual link is used to connect an OSPF area to the backbone (Area 0) through another area, or to connect non-contiguous Area 0 segments; it is not a mechanism for filtering routes during redistribution between different routing protocols.

Configuring a router as a stub in EIGRP or OSPF primarily affects how routes are advertised within those protocols or areas, typically by limiting them to default routes, which contradicts the need to share a specific server route.