Selecting one of multiple redundant network access points on {HEAD ~ a node} within {TAIL ~ an industrial process control network} 
within
Selecting one of multiple redundant network access points on { HEAD ~ a node } within { TAIL ~ an industrial process control network }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL