"rttm" - 1 õppematerjal

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: 1) - ­ 2) 3) - . . . 22. TCP taimerid - , , . 1. (retransmission; RTO) (ACK). . ACK , c. ACK, , . 2. (persist timer), , . , , . . . . , window=0. 3. (keepalive), -. 2 . . 4. 2MSL- (Maximum Segment Lifetime) TIME_WAIT. active close ACK. , , RTT ( ). TCP- RTT. RTT: RTTm = a×RTTm + (1-a)×RTTi, RTTi - , RTTm - , , - , 0.9 23. TCP voo juhtimine , ­ , , . . , ­ . TCP , , , . TCP , ACK SN (Acknowledge Sequence Number) . , , 2000 ,  ACK SN = 2001: , ISN+1=1 ACK SN -1 (2000) (. . 3.1.2). . 3.1.2. ACK SN " ", - 6000. , ACK SN = 2001 (ACK SN + -1) = 8000, .