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Refer to the exhibit. The network has been configured with STP. The Root Port of Switch "SW3" has failed. What is the new cost for SW3 to find a single path to the Root Bridge?
8
23
4
12
16
The Root Bridge is "SW2" because it has the lowest priority value among all other routers. The former cost value of SW3 to reach the Root Bridge was 4 (1Gb/s), since the link failed the STP needs to re-converge. And the path that SW3 will take to reach the Root Bridge will be from SW1 to SW4 to SW2, the cost is (4+4+4=12) which is lower than from SW1 to SW2 (4+19=23). For more information: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4000/8-2glx/configuration/guide/spantree.html#wp1193564
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