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
Explanation:
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.