Refer to the exhibit.
Exhibit: Network topology
A company has implemented a switched network based on the RSTP spanning tree protocol.
Assume the following:
All switches have the same priority
All ports have the same cost
All ports have the same priority
Based on this information, which answer is correct?
A.
Port 2 on SwitchC is a designated port.
B.
Port 3 on SwitchC is a designated port.
C.
Port 1 on SwitchB is a discarding port.
D.
Port 1 on SwitchD is a root port.
Explanation:
MSTP selects the device with the lowest MAC address as the root bridge, so in this case it is
SwitchD. The root bridge is the only bridge in the network that does not have a root port. All other
bridges receive BPDUs on at least one port.
How B could be the answer. It should be a root port right?
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I agree with you.
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The root switch, is A. has the lowest Mac address, so the answer should be c, port 3 on switch c is a designated port.
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I dont know how you can even say that tha MAC address of A is lower than D
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For me the correct answer is A and C. The lowest MAC is from the switch D. So B can’t be because is a root port, and D can’t be because is a designated port.
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Port 2 on Switch C is a discarding port, the designated is Port 1
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I was wrong, it is only letter A.
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D because it has the lowest mac address. SO it will be the root bridge of the entry network on the figure shown.
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so, what is the correct answer?
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C is the right one
Switch D is root, it’s ports are designated
Switch C port 3 is root port
Switch B port 2 is root port
Switch A will go through SwitchC and the other port 3 is blocked
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there are no correct answer.
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