The advantages of {HEAD ~ heterogeneity} and concurrency of {TAIL ~ the distributed system} are thus extended to its switched communications links with external switched networks 
The advantages of { HEAD ~ heterogeneity } and concurrency of { TAIL ~ the distributed system } are thus extended to its switched communications links with external switched networks
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH