Refer to the exhibit.
Each of these four switches has been configured with a hostname, as well as being
configured to run RSTP. No other configuration changes have been made. Which three of
these show the correct RSTP port roles for the indicated switches and interfaces? (Choose
three.)
A.
SwitchA, Fa0/2, designated
B.
SwitchA, Fa0/1, root
C.
SwitchB, Gi0/2, root
D.
SwitchB, Gi0/1, designated
E.
SwitchC, Fa0/2, root
F.
SwitchD, Gi0/2, root
Explanation:
The question says “no other configuration changes have been made” so we can understand
these switches have the same bridge priority. Switch C has lowest MAC address so it will
become root bridge and 2 of its ports (Fa0/1 & Fa0/2) will be designated ports.
Because SwitchC is the root bridge so the 2 ports nearest SwitchC on SwitchA (Fa0/1) and
SwitchD (Gi0/2) will be root ports..
Now we come to the most difficult part of this