Given: 1) IRTT= $20$ms
2)$\alpha=0.9$
3) NRTT= $22,24,23$ms
Expected RTT can be calculated in TCP as follows:
$\text{ERTT=$\alpha*$IRTT+(1-$\alpha$)*NRTT}$
- ERTT=$0.9*20+0.1*22=20.2$ ms
- ERTT=$0.9*20.2+0.1*24=20.58$ ms
- ERTT=$0.9*20.58+0.1*23=20.82$ ms
Note: each time when we calculated ERTT, it will become IRTT for the next part.
Option (C) is correct.