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Consider a network consist of 4 interconnected nodes P,Q,R and S. Distance between them are as follows: PQ=254km, PR=243km,  PS=287km, QR=239km, QS=300km, RS=120km. This network uses CSMA/CD and signal travels at a speed of 2*10^5 km/sec, if sender sends at a rate 1Mbps, what could be the maximum size of packet?  Ans___?__ bits

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D = 1443*10*3M

V = 2*10^8 m/s

Tp = d/v = 7215 microseconds

Tt = 2*tp = 14,430 microseconds

Tt = msg/B.W

msg = 14,430 bits

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