I recently took the CCNA ICND part 2 test and failed. There is a question that I am really having trouble with. I'll describe the network diagram and then ask the question.
Recreate the diagram as follows:
1. Draw 3 switches across the bottom of the page. Label the switches A, B, and C.
2. Each switch has 2 hosts attached, labeled Vlan 10 and Vlan 20.
3. Switch A has a single link to Switch B.
4. Switch B has a single link to Switch C.
5. Draw a switch above Switch A and label it Switch D.
6. Draw a switch above Switch C and label it Switch E.
7. Switch D has a single link to Switch A and a single link to Switch C.
8. Switch E has a single link to Switch A and a single link to Switch C.
9. Switch D has a Server attached and labeled Vlan 10.
10. Switch E has a Server attached and labeled Vlan 20.
There are no mac addresses, port numbers, link types or costs shown. The only additional information given is that Switch E is the Root for all vlans.
The question is what path will a frame sent from the host attached to Switch A (Vlan 10) take to reach the server attached to Switch D (Vlan 10)?
The second question is which switch would you choose as the root for vlan 20 if you were designing the network?
It seems to me there are 2 correct answers given. (The path from Switch A to Switch D) or (the path from Switch A to Switch E to Switch C to Switch D). The answer will depend on which port Switch D chooses as its root port. Since Switch D will receive two equal cost paths to the root, how do you know which will be chosen without additional information?
As for the second question I know you are supposed to select a switch in the middle of the network (ie Switch B), but Switch E seems more logical.
Please, please help if you can.