Cisco 200-125 Exam

In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

  • A. during high traffic periods
  • B. after broken links are re-established
  • C. when upper-layer protocols require high reliability
  • D. in an improperly implemented redundant topology
  • E. when a dual ring topology is in use
Answer: Option D.

If we connect two switches via 2 or more links and do not enable STP on these switches then a loop (which creates multiple copies of the same unicast frame) will occur. It is an example of an improperly implemented redundant topology.

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