Thus, {HEAD ~ unnecessary delays} are minimized in systems where {TAIL ~ the block size} of the data is variable 
Thus , { HEAD ~ unnecessary delays } are minimized in systems where { TAIL ~ the block size } of the data is variable
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH