By having {HEAD ~ the packets} located on {TAIL ~ separate pages}, additional data other than the packets at issue do not have to be shared, and copying is not necessary to complete the scanning process 
located on
By having { HEAD ~ the packets } located on { TAIL ~ separate pages } , additional data other than the packets at issue do not have to be shared , and copying is not necessary to complete the scanning process
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH