6.下列四個TCP協定的計時器中,何者是用來估算RTT(RoimdTripTime)?
(A) Persistence Timer
(B) Retransmission Timer
(C) Time-Waited Timer
(D) Keepalive Timer
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統計: A(15), B(100), C(43), D(13), E(0) #2270065
統計: A(15), B(100), C(43), D(13), E(0) #2270065