A plurality of {HEAD ~ elements} is connected to the network including a monitor server, wherein the monitor server includes monitoring means for obtaining status information from the plurality of {TAIL ~ elements} 
A plurality of { HEAD ~ elements } is connected to the network including a monitor server , wherein the monitor server includes monitoring means for obtaining status information from the plurality of { TAIL ~ elements }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL