TCP - Occurence of Timeout & Transmission Phases

Q.  Which among the following specifies the impossibility of updating RTT estimator during the arrival acknowledgement of retransmitted data especially at the occurrence of timeout and retransmission phases in TCP?
- Published on 30 Oct 15

a. NAGLE algorithm
b. Karn's algorithm
c. Clark's Solution
d. All of the above

ANSWER: Karn's algorithm

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