14. . QoS IP-
, , . VoIP ( IP), . ATM , QoS. IP- QoS. ATM, QoS , . : ATM (, ), ( IP- ); IP- ATM. , QoS IP-. QoS IP : (nd - t - end), (hop by hop) IP, MPLS (Multiple Protocol Label Switching). IntServ, DiffServ (DS) [30].
IntServ
, IETF, RSVP (Resource reservation Protocol). , . RSVP , . , , . RSVP , , , , . RSVP (. 14.1).
. 14.1. RSVP
R1, R2, R3 .
14.1, RSVP : PATH RESV. PATH :
Tspec, , ( );
(IP-, UDP/TCP ).
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PATH, RESV, , , Rspec (R , Reserve). Rspec QoS, . , , , , , IP : IP- , , IP- . , , . , spec. .
RSVP . . , , RSVP , QoS. , , . , IP- . . . . RSVP IP-. . RSVP MPLS.