2. Terminology

Name Resolution Service (NRS): An NRS in ICN is defined as a service that provides the function of translating a content name or a data object name into some other information such as a routable prefix, a locator, an off-path-cache pointer, or an alias name that is more amenable than the input name to forwarding the object request toward the target destination storing the NDO [RFC9138]. An NRS is most likely implemented through the use of a distributed mapping database system. The Domain Name System (DNS) may be used as the NRS [NDN-DNS-Orchest].

NRS System: An NRS system is an application-layer distributed system that maintains the mapping records. It consists of NRS servers and the protocol that is used for managing and retrieving the mapping records.

NRS Server: An NRS server is a component of the NRS system that stores and maintains the mapping records. It also handles the name resolution requests from the NRS clients.

NRS Client: An NRS client is a component that sends name resolution requests to the NRS system. It can be an end host, a router, or an application.

Name Mapping Record: A name mapping record is an entry in the NRS database that maps a content name to some other information (e.g., a locator, an alias name).