What measure to use for the cost between {TAIL ~ two neighboring devices}, depends on the network at {HEAD ~ hand} 
What measure to use for the cost between { TAIL ~ two neighboring devices } , depends on the network at { HEAD ~ hand }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD