In such a stack it is necessary to provide {HEAD ~ interconnection} between the stacked devices via what is known as a cascade connection in order to allow users connected to one device to communicate with users connected to {TAIL ~ other devices} 
In such a stack it is necessary to provide { HEAD ~ interconnection } between the stacked devices via what is known as a cascade connection in order to allow users connected to one device to communicate with users connected to { TAIL ~ other devices }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL