The distributed index may be used, for example, to route messages between participating peers, in identifying and authenticating peers wishing to participate, in notifying {HEAD ~ peers} of newly joined peers, and in notifying joining peers of {TAIL ~ participating peers} 
The distributed index may be used , for example , to route messages between participating peers , in identifying and authenticating peers wishing to participate , in notifying { HEAD ~ peers } of newly joined peers , and in notifying joining peers of { TAIL ~ participating peers }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL