Local Route 53 Resolver endpoints also enable DNS resolution between Outposts and your on-premises DNS server. Route 53 Resolver on Outposts helps to improve your on-premises applications availability and performance.
Route 53 Resolver outbound endpoints enable Route 53 Resolvers to forward DNS queries to DNS resolvers that you manage, for example, on your on-premises network. In contrast, Route 53 Resolver inbound endpoints forward the DNS queries they receive from outside the VPC to the Resolver running on Outposts.
Inbound endpoints allow to forward external DNS queries to the local Resolver on the Outpost.