Certificate discovery protocol. A request/response protocol used by two parties to transfer certificates.
Cisco Discovery Protocol
RL istribution oint Field (extension) on X.509 v3 certificates that (in theory) tells programs reading the certificates where to get the certificate revocation list ( CRL).
CRL Distribution Point
certificate distribution point. Field within a digital certificate containing information that describes how to retrieve the CRL for the certificate. The most common CDPs are HTTP and LDAP URLs. A CDP may also contain other types of URLs or an LDAP directory specification. Each CDP contains one URL or directory specification.