JINI: Has a Jini Lookup Service (JLS), exactly as MG.
Universal Plug and Play: UPnP uses SSDP over HTTP in two fashions, UDP(HTTPU) and UDP(HTTPMU). A service joining can unicase or multicase to the default selected set of clients or peers about it's arrival in the network and start of service. A client can directly contact a server based on URL or can multicase a request. UPnP seems to be a resonably good one since its architecture says 'NO' to centralized directory server.
SALUTATION: The salutation architecture defines another centralized entity as Salutation Manager (SLM), exctly as SLP's Directory Agent, or JINI's JLS or Nomadic's MG.
Hence, I am going to write or delve deeper into Universal Plug and Play only in the further blog contents. UPnP has five steps in all:
Advantage of Nomadic over MANET are: