Sngl sgn-n (SS) s n thntctn schm tht llws sr t lg n wth sngl SS D t ny f svrl rltd, yt ndpndnt, sftwr systms.
Tr sngl sgn-n llws th sr t lg n nc nd ccss srvcs wtht r-ntrng thntctn fctrs.
t shld nt b cnfsd wth sm-sgn n (Drctry Srvr thntctn), ftn ccmplshd by sng th Lghtwght Drctry ccss Prtcl (LDP) nd strd LDP dtbss n (drctry) srvrs.
smpl vrsn f sngl sgn-n cn b chvd vr P ntwrks sng cks bt nly f th sts shr cmmn DNS prnt dmn.
Fr clrty, dstnctn s md btwn Drctry Srvr thntctn (sm-sgn n) nd sngl sgn-n: Drctry Srvr thntctn rfrs t systms rqrng thntctn fr ch pplctn bt sng th sm crdntls frm drctry srvr, whrs sngl sgn-n rfrs t systms whr sngl thntctn prvds ccss t mltpl pplctns by pssng th thntctn tkn smlssly t cnfgrd pplctns.
Cnvrsly, sngl sgn-ff r sngl lg-t (SL) s th prprty whrby sngl ctn f sgnng t trmnts ccss t mltpl sftwr systms.
s dffrnt pplctns nd rsrcs spprt dffrnt thntctn mchnsms, sngl sgn-n mst ntrnlly str th crdntls sd fr ntl thntctn nd trnslt thm t th crdntls rqrd fr th dffrnt mchnsms.
thr shrd thntctn schms, sch s pnD nd pnD Cnnct, ffr thr srvcs tht my rqr srs t mk chcs drng sgn-n t rsrc, bt cn b cnfgrd fr sngl sgn-n f ths thr srvcs (sch s sr cnsnt) r dsbld. n ncrsng nmbr f fdrtd scl lgns, lk Fcbk Cnnct, d rqr th sr t ntr cnsnt chcs pn frst rgstrtn wth nw rsrc, nd s r nt lwys sngl sgn-n n th strctst sns.