0 votes 0 votes When do we use $\eta = 1/(1+6.44a)$ and when do we use $\eta = 1/(1+2a)$ {a = pd/td}. I am very confused between efficiency, throughput, utilization...please help! {Pd = Propagation delay, td = transmission delay} Computer Networks ethernet computer-networks + – Sumaiya23 asked Feb 1, 2018 Sumaiya23 583 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply sumit chakraborty commented Feb 1, 2018 reply Follow Share From what I recall 6.44a is for the CSMA/CD one and the other is just in general for sliding window, congestion, stop-wait etc. https://www.geeksforgeeks.org/computer-network-efficiency-csmacd/ https://gateoverflow.in/27636/formula-for-calculating-efficiency-of-ethernet 0 votes 0 votes Sumaiya23 commented Feb 1, 2018 reply Follow Share Yeah...thanks! 0 votes 0 votes Please log in or register to add a comment.