Question

Consider a packet of length L, which begins at source and travels over seven links to a destination. These links are connected through six routers. Let di, si, and Ri denote the length, propagation speed, and the transmission rate of link i, for i = 1 to 7. The processing delay at each router is d-proc. The queuing delay at each router is d-que. What is the total end-to-end delay for the packet in terms of di, si, Ri (i = 1 to 7), and L?

Answer 1

`delay=(L)/(R_1)+(L)/(R_2)+(L)/(R_3)+(L)/(R_4)+(L)/(R_5)+(L)/(R_6)+(L)/(R_7)+(L)/(R_7)+(d)/(S_1)+(d)/(S_2)+(d)/(S_3)+(d)/(S_4)+(d)/(S_5)+(d)/(S_6)+(d)/(S_7)+d_(pro)+d_(que)`

Step-by-step explanation:

Given that

Length of packet = L

Number of routers = 6

Propagation delay = d-proc

Queuing delay = d-que

The formula for finding end to end delay given as

`delay=(L)/(R_1)+(L)/(R_2)+(L)/(R_3)+(L)/(R_4)+(L)/(R_5)+(L)/(R_6)+(L)/(R_7)+(L)/(R_7)+(d)/(S_1)+(d)/(S_2)+(d)/(S_3)+(d)/(S_4)+(d)/(S_5)+(d)/(S_6)+(d)/(S_7)+d_(pro)+d_(que)`