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