ISO/IEC 9594-5:2005 provides specifications for how information about objects, e.g. persons, is organized, created, maintained and retrieved. It also gives provisions for protecting stored information through authentication and access control specifications.ISO/IEC 9594-5:2005 specifies the Directory Access Protocol, the Directory System Protocol, the Directory Information Shadowing Protocol and the Directory Operational Binding Management Protocol, fulfilling the abstract services specified in ISO/IEC 9594-2, ISO/IEC 9594-3, ISO/IEC 9594-4 and ISO/IEC 9594-9. It defines both the use of an OSI and of an TCP/IP underlying protocol stack.