Exam 400-007 topic 1 question 231 discussion

Stated “ each link handles 7 MB . That means both links are actively in use . Add Qos avoid congestion while one link failed . So , i feel option A is right answer

The most suitable solution would be D. Use dynamic routing for equal-cost multipath (ECMP). By implementing dynamic routing with ECMP, the customer can effectively utilize both 10-Mbps links and balance traffic across them. This would improve resilience and prevent a single link failure from significantly impacting performance, as traffic would be redistributed across the remaining link or any additional links added in the future. It allows better handling of link failures without increasing CAPEX, as it can work with the existing links and static routing can be replaced with a more flexible dynamic routing protocol.

B. It did not explain the root cause of why the link fails - is it on the ISP side or the router side? So add a third link to the current router can solve the problem when a link fails.

Link failure means you need 14Mbps and have 10Mbps. Capex is Capital expenses, so adding third link do not increase CAPEX but OPEX.

QoS is just a bandaid. The better answer is to bring in another provider that can provide enough bandwidth. QoS will only work in times of congestion, so app classification is needed with shaping. I would tell this to the customer as short term and mid term goals.

this question is so stupid. you need both dynamic routing and qos for it to not overload the circuit and to failover

if one of the 10 Mbps links fails, the remaining link must handle 14 Mbps of traffic, it will be overloaded. the other option that would not increase capex is to implement qos, shaping/prioritization.

current 2 equal 10M path and static route cannot fail over, the answer should be dynamic routing protocol to load balancing and swicth itself, choose answer D

No increase capex then QoS