Q2 : Suppose that a sender and a receiver are using ARQ to perform reliable data delivery. In a Go-Back-N ARQ protocol, the window size is 8. Frames with sequence numbers 1, 2, 3, 4 and 5 have been sent. The sender just received an ACK for frame 1. Frames 6, 7, 8, 9 and 10 are waiting to be sent. Draw the time diagram showing this scenario.

a)Illustrate how DSR constructs a route between a source S and and destination K in the network above. Clearly show the routing information stored in each RREQ packet and the routing information stored in each node. (Use the blank pages at the end)

Assume that in the route constructed in part (c), the last link (i.e. the link connected to K) becomes broken. Show when and how DSR will fix this problem. (Use the blank pages at the end)

MHL MHL