b) The propagation time and transmission time for 6 MBytes information is 150 ms and 48 seconds respectively. Assume that light travel at 2.4 x 10 m/s. Find the

(i) Network bandwidth. (ii) Distance between sender and receiver.

a) Figure 1 shows the bridged LAN, assume that LANs A, B and C utilize 10 Gbps link (cost is 2) LANs D,E and F utilizes 1 Gbps link (cost is 4) and LANs G, H and I utilizes 100 Mbps link (cost is 19). Using spanning tree algorithms determine construct the following. 1) Root bridge, Root ports and blocking port. ii) Spanning tree structure for the Figure 1 (Least cost path) (7 Marks) (1) (2) B (1) 32677:AA-FO-C1-4F.CF-00 (3) I F 32677:AC-D1-C1-03-F3-13 (2) |32678:AC-DF-C1-F0-C1-03 (2) (1) (1) D E (3) 32678:AC-C1-01-F1-C0-01 (1) (5) (2) (2) 32677:AC-DO-B2-C1-03-FE-10 (3) (4) b) The propagation time Figure 1