This diagram is cut off at the top, right? The given answer is wrong because a switch does not become the root bridge by having the highest MAC address. First criterion is the switch with the lowest priority will become the root bridge, but if all switches have the same priority then the switch with the lowest MAC will become the root bridge
lowest bridge/switch priority value = Higher priority to be selected as the root bridge. The wording is confusing. I don't think they are referring to the value but instead to the priority itself.
your answer is wrong. look at the exhibit once more and notice the actual priority values given and you'll see that the bridge priority value for SW4 is lowest, indicating that its actual priority is highest.
I had this question on my exam, cut off info is:
SW1 has prioroty 8192 and MAC ending with 41
SW2 has priority 16384 and MAC ending with 43
So SW4 will become a root bridge, but not because it's priority is highest, broken answer i guess, may be just bad wording as always
the switch with the highest bridge ID (that is, the lowest numerical ID value) is elected as the root bridge. If all switches are configured with the default priority (32768), the switch with the lowest MAC address in the VLAN becomes the root bridge.
Configuring Rapid PVST+, Page 5
Switch with the Lowest Bridge ID is elected as the root bridge.
Bridge ID consists of both the MAC address and Bridge priority.
Bridge priority takes precedence over MAC address when selecting the root bridge.
A lower switch priority value means a higher priority to be selected as the root bridge
A lower MAC address means a higher priority to be selected as the root bridge
B & C are wrong
If 2 switches have the same priority, then the switch with the lowest MAC address will be selected as the root bridge. D is incorrect because SW3 has the same priority as SW4 but SW4 has a lower MAC address giving it a lower bridge ID.
A is the correct answer
PS: the answer might differ if the exhibit is complete, it's cut off in our case but the steps to solve the question are the same.
https://ccna-200-301.online/stp-operations/
The layer 2 device with the lowest bridge ID (bridge priority + MAC address) is elected as the root. -All in One CCT/CCNA Routing and Switching
(B) SW1 has the LOWEST PRIORITY. We're done!
I don't think these semantic gymnastics are relevant. When they say priority, they're most certainly referring to the priority *number*, as is configured by the "spanning-tree vlan <vlan-number> priority <priority>" command.
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