Free Cisco 400-007 Actual Exam Questions - Question 1 Discussion
loop would be reduced by using this design?
B - OSPF LFA is designed to minimize short-lived micro loops during topology changes.
B/D? LFA mainly reduces micro loops, but REP deals with ring topologies too. Since the question specifies OSPF LFA, micro loops (B) still seem more relevant than REP loops (D).
Makes sense to pick B here since OSPF LFA targets those brief routing blips during failover, not the broader loops handled by STP or REP. So, B it is.
It’s B as well. OSPF LFA is all about preventing those quick, temporary micro loops that happen during topology changes, not about spanning tree or rep loops.
B. OSPF LFA is designed specifically to reduce micro loops by providing fast reroute paths in case of link or node failures. The other options don’t really relate to OSPF’s loop prevention mechanisms—DTP is about trunking, STP handles Layer 2 loops, and REP is a different protocol altogether. So, the main benefit here is minimizing brief routing inconsistencies, aka micro loops.
It’s B, since OSPF LFA mainly targets reducing micro loops during reroutes.
B. Micro loops happen during quick topology changes and OSPF LFA is made to provide instant backup routes to avoid those. The other options are unrelated to OSPF’s loop prevention focus.
Option B makes sense since OSPF LFA is about quick failover and avoiding those brief routing loops, which are micro loops. The other options relate to different protocols or layers entirely.
B. Micro loops are the issue here because OSPF LFA is specifically designed to provide backup paths that avoid temporary routing loops during convergence. The other options don’t really relate—DTP is about trunk negotiation, STP handles layer 2 loops, and REP is a ring protocol not tied to OSPF. So yeah, micro loops make the most sense for this question.
This one caught me off guard at first, but I’d say the answer is B. OSPF LFA stands for Loop-Free Alternate, which helps avoid micro-loops during routing changes. The others don’t really fit-STP is more about switches preventing loops in Layer 2, and DTP/REP are unrelated here.