Refer to the network exhibit.
Assume the network shown in the exhibit has implemented RSTP Based on the topology, which
port is a root port?
A.
SwrtchAport2
B.
SwitchD port 1
C.
SwitchC port 2
D.
SwitchB port 1
Explanation:
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Correct answer D
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Your wrong. Look at lowest MAC
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switch C port 2, tell me guys if i need to explain why.
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Can you please explain to me neruin?
Isn’t Switch C here the root bridge since it has the lowest mac address (or BID = pri+MAC)!
Since there is no BID here I assumed they have the same priority and so Switch C is the Root bridge.
Root bridge ports are always designated!!
Can you please explain?
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Answer A.
Agree with Steve.
” Root Port is a single selected port on a Switch, other than Root Switch, with least Path Cost to reach the Root Bridge.”
SwitchC is the root bridge and can’t have root ports.
Therefore, the right answer is SwrtchA port2 .
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Correct answer is choice D. SwitchB port 1
RootBridge is Swtich C because Lowest MAC address:
Switch A Port 1: Root (MAC Port 1 Lower than MAC Port 2)
Switch A Port 2: Alternate
Switch A Port 3: Designate
Switch B Port 1: Root (Equal bandwidth to RootBridge then select form lower MAC Address)
Switch B Port 2: Alternate
Switch C Port 1: Designate
Switch C Port 2: Designate
Switch C Port 3: Designate
Switch D Port 1: Designate
Switch D Port 2: Root
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