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Question 322

Refer to the exhibit. Which switch becomes the root of a spanning tree for VLAN 10 if the primary switch fails and all links are of equal speed?

    Correct Answer: C

    To determine the root switch for VLAN 10 if the primary switch fails, we need to follow the spanning tree protocol (STP) rules. The root switch is the one with the lowest bridge ID, which is a combination of the bridge priority and the MAC address. According to the exhibit, the bridge priorities are implicitly given by the numbers before each MAC address. All else equal, the switch with the lowest numerical value will become the root. We can see: SW1: 32778, SW2: 24586, SW3: 28682, SW4: 64000. SW2 is currently the root with the lowest priority. If SW2 fails, the switch with the next lowest priority is SW3 (28682), making it the new root switch. Therefore, the correct answer is SW3.

Discussion
dannyodeOption: C

Switch 2 is primary. But in this context, that is to say when it fails, the primary is chosen between SW1, SW3 and SW4. Thus, SW3 becomes the root. Answer C is correct.

freeknowledge123

we need an admin here to check this bellabop, ruining answers for all users.

Elle_33

Let us report it

Godfather2022

@ Bellabop please desist from confusing people. We hear to learn.

FALARASTA

The answer is correct. Which one after the first one.

CertBusterOption: C

It's C. The bridge priority takes precedence over the MAC address. It's only used as a tie-breaker in the case that priorities are equal. This should not be so contentious.

BilboBagginsJrOption: C

The wording for this question is important (if the primary switch fails). The bridge priority takes precedence over the MAC address. Switch 2 is the primary switch (it has the lowest number bridge priority). Switch 3 would be the backup (it has the second lowest number bridge priority). Answer is C.

NoneDoneOption: C

Lowest priority after the primary (SW2) is SW3

Darwyn

Correct

dncastroOption: C

To answer this question, we first have to identify which switch is the root of the network, based on the information in the image, the switch with the smallest BRID becomes the root, in this case SW2, since it is the root at the moment If it fails, there will be a new election following the same criteria, so SW3 becomes the root of the network. The correct answer is C, SW3.

SeMo0o0oOption: C

C is correct. SW2 is the primary Switch, so SW3 is the Backup.

a67c04aOption: C

It´s C

JunsK1eOption: C

Answer is correct

rozekjablkowyOption: C

C is correct

kylepttOption: C

Switch 3 make sure to read these questions carefully guys

bladezpro29Option: C

the correct answer is C for sure

FiranmitMegersaOption: C

Switch 1 is already root bridge, if it fails switch 3 will be root bridge so correct answer is C

g0dofnubOption: C

C is correct 2nd lowest priority

Alternative8787Option: C

the key : ((if the primary switch fails and all links are of equal speed?)) its mean wthe SW2 is the Primary and its fails, so the Primary now is SW3

eb63e5aOption: C

C is correct answer

eb63e5aOption: C

C is perfect after I carefully read the question