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Exam 300-320 topic 1 question 84 discussion

Actual exam question from Cisco's 300-320
Question #: 84
Topic #: 1
[All 300-320 Questions]

A network engineer is designing an access layer that requires all uplinks to be active. Furthermore, VLANs must span across the entire switch block. What design fulfills this requirement?

  • A. Layer 2 looped triangle
  • B. Layer 2 looped square
  • C. Layer 2 loop-free U
  • D. Layer 2 loop-free inverted U
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Suggested Answer: D 🗳️

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scar
4 years, 10 months ago
if there are two possible answers then they shoud be loop-free, as question demands all links active. Looped square has links blocked by STP
upvoted 1 times
scar
4 years, 10 months ago
Please disregard. Looped square does have a link blocked but it is between the access switches, not uplinks. Correct answers are looped square and inverted U.
upvoted 1 times
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mimo1000
5 years, 1 month ago
The question said (not include in this site) choose 2 answers so both of you are correct loop square and inverted U.
upvoted 2 times
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bella
5 years, 5 months ago
the reason why I believe it is correct as D is because it doesn't have a single point of failure looped square Support VLAN extension and Layer 2 adjacency across access layer switches • Resiliency achieved with dual homing (STP controlled) • Offer quick convergence with 802.W/S STP standards • In case of an access to distribution link failure or a distribution switch failure, the second access switch will carry all the traffic load of both access switches • 50 percent of access layer traffic might cross the inter-distribution switch link to reach the active FHRP Loop Free Inverted U • Support VLAN extension and Layer 2 adjacency across access layer switches • No STP blocking; all uplinks are active • If access switch uplink fails or one distribution switch fails, the devices connected to that access switch will be isolated (single point of failure)
upvoted 1 times
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Budgie
5 years, 6 months ago
Umm - think looped square is correct as well.
upvoted 1 times
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C (25%)
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