2. Estimate the fail-over time of the following network. The failure scenario is that t active link between the switches goes down. a. Configuration A: calculate default STP timers. b. Configuration B: calculate default STP timers for LOS. IT 377 Homework #2 Page 3 c. Configuration C: calculate min STP timers. d. Configuration D: Calculate min STP timers for LOS. e. Configuration E: Calculate default RSTP. 3. Show the root switch and label each port as Root Port (RS), Designated Port (DS and Blocked Port (BS) in the following diagram. Use a large dot to indicate the blocked port. (P is the priority of the switch.) 20 BR1 P=100 BR2 P=200 100 4 BR3 P=300 BR4 P=400 20