The Ethernet hub is arranged to connect {TAIL ~ the network port} and the port of {HEAD ~ the first interface} 
The Ethernet hub is arranged to connect { TAIL ~ the network port } and the port of { HEAD ~ the first interface }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD