Exam 300-209 topic 1 question 168 discussion

SDP (also refer red to as Trusted Transitive Introduction [TTI]) is a communication protocol that provides a bidirectional introduction between two end entities, such as a new network device and a Virtual Private Network (VPN). SDP involves the following three entities (see the figure below): Introducer--A mutually trusted device that introduces the petitioner to the registrar. The introducer can be a device user, such as a system administrator. An introducer can be configured as an administrative introducer, which allows an administrator performing the introduction to supply the name for the device being introduced. The supplied device name is used as if it were the name of an introducer in the normal SDP mechanisms, preserving the existing functionality of the SDP configuration. For more information on function of the administrative introducer, see the section Authentication and Authorization Lists for an Administrative Introducer. Petitioner--A client, or new device, to be introduced to the secure network. Registrar--A server that authorizes the petitioner. The registrar can be a certificate server.