The RPC runtime library contains services that support RPC applications. Each RPC runtime service provides a set of callable routines for application programmers. In some cases, these services are accessed transparently by the stub routines. The services include:
· Communication Service¾Interface to the underlying service that establishes communication and transmits and receives remote procedure calls
· Directory Service¾Interface to directory services
· Security Service¾Interface to security
Figure 3 RPC Runtime Library