Machine manager 610 understands the physical topology of the networks and keeps {TAIL ~ track} of the location of the physical machines and virtual machines which are members within {HEAD ~ each} of the networks 
Machine manager 610 understands the physical topology of the networks and keeps { TAIL ~ track } of the location of the physical machines and virtual machines which are members within { HEAD ~ each } of the networks
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH