Introduction This Part is directed toward CDPD Service Providers and manufacturers intending to build equipment for use in the CDPD internal network. This Part may impact CDPD subscribers and Mobile End System (M-ESs) manufacturers. Applications within M-ESs often communicate with applications in Fixed End Systems (F-ESs) utilizing the CDPD Network as a communications backbone. One of the application services that the CDPD Network should provide is the CDPD Domain Name System (DNS)@ which is based on the Internet DNS. Use of CDPD DNS by subscribers is entirely optional. CDPD DNS is consistent with the IAB Standards RFC1. This RFC recommends the use of the following RFCs for host implementations: ?[RFC-1034]@ Domain Names - Concepts and Facilities ? [RFC-1035]@ Domain Names - Implementation and Specification ? [RFC-974]@ Mail Routing md the Domain Name system. Implementations of the CDPD DNS name servers and resolvers (described below) in the CDPD Network shall use the Internet suite of protocols defined in [IS-732-311]@ 1. As of this writing [RFC-1360] is the IAB Standards RFC.