problem1 and problem 2

Problem 1) Demonstrate the operation of the spanning tree protocol on the following network. Identify the root bridge, root ports, and designated ports. Show the resulting spanning tree paths Assume that nodes are bridges and clouds are LAN segments, and that lower bridge numbers are preferred in any ties. Problem 2) a) Compute the CIDR address range for the address 145.75.116.0 with a netmask of 255.255.254 show the resulting binary representation of the range. b) Assume you want to break up the address space in b) into 5 networkslone with 200 systems, one network with 100 systems, one networks with 50 systems, and two networks with 25 system Provide the resulting CIDR ranges for each network. Problem 3) Identify the appropriate router table rules (CIDR range/interface) for the following address ranges. 145.75.112.0-145.75.115.255 Int 1 145.75.116.0-145.75.116.255 Int 2 .Else->Int 3 Problem 4) 100 Mpbs network has a slot time of 5.12 usec and uses CSMA/CD. There are 20 ho on the network, all actively trying to send 1500 byte frames. What is the network's channel efficiency (i.e, what percentage of time is it sending actual data vs the time in contention)