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