Most clients only need to perform name lookups in the directory server. To perform a lookup, the directory server must allow anonymous authentication. Directory servers usually do this by default. To look up entries, a client must be able to find the directory server in which that entry resides. Clients locate a directory in one of two ways: ■ Dynamically, by using DNS. In this case, the directory server location information is stored and managed in a central domain name server, and the client, at request processing time, retrieves this information from the DNS server dynamically. ■ Statically, in a directory server.