Exam 400-007 topic 1 question 2 discussion

B. They ask for best time (speed), nothing about natural disaster, like in other similar question. So, we need synced replication and fast interconnect - Metro Ethernet, SONET/SDH or WDM.

should be B

To achieve an RTO (recovery time objective) and RPO (recovery point objective) as close as possible to zero, the best option would be synchronous replication over geographically dispersed dual data centers via MPLS (option A). RTO and RPO are measures of how quickly and accurately a system can be recovered after a disaster or failure. RTO refers to the amount of time it takes to restore a system to its normal operation after a failure, while RPO refers to the amount of data that can be lost as a result of a failure. In synchronous replication, data is written to both the primary and secondary systems at the same time. This ensures that the data on the secondary system is always up-to-date and ready for use in the event of a disaster or failure. Geographically dispersed dual data centers refer to two data centers that are located in different geographical locations, which can help to reduce the risk of a disaster or failure impacting both data centers at the same time.

should be B

MetroEthernet has lower delay for geographically dispersed DCs and replication. Answer B

I think key phrase is - "RTO and RPO for a new system should be as close as possible to zero" means we should put it different country via MPLS, should be dispersed but close by, the more far it is the more RTO/RPO

Metro Ethernet is a high-speed, low-latency network technology that enables synchronous replication between data centers that are relatively close geographically, minimising the impact of latency on system performance and helping to maintain a low RTO.

Answer A

A is the ans

should be B based on https://www.cisco.com/c/dam/global/en_my/training-events/cnsf/files/T2-S3_Rajinder.pdf as distance increase between DCs synchronous replication become difficult