This object identifies which detection mechanism produced this binding entry, such as netbiosquery(3), dns(5), kerberos5(6), or rsvp(7), corresponding to the protocol-specific collection features enabled via objects like extremeDlcsDnsEnable. Administrators use this to judge how reliable or fresh a given binding's identity information is likely to be, since different sources have different accuracy characteristics. Seeing kerberos5(6) as the source, for instance, tells an admin the user identity came from observed Active Directory authentication traffic rather than a weaker heuristic like local(2) inference.