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