Since the switch 7 a is not a part of the Internet, it is necessary for the packet switching transfer of data through the Internet to first make {HEAD ~ a connection} with {TAIL ~ the access point} POP 6 
with
Since the switch 7 a is not a part of the Internet , it is necessary for the packet switching transfer of data through the Internet to first make { HEAD ~ a connection } with { TAIL ~ the access point } POP 6
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 OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH