CCDE: Cisco Certified Design Expert (Practical) — Question 112

An architect receives a business requirement from a CTO that states the RTO for a new system should be 4 hours, and the RPO should be less than 1 hour. Business continuity must also be ensured in the event of a natural disaster. Which replication method and data center technology should be used?

Answer options

• A. asynchronous replication over dual data centers via DWDM
• B. asynchronous replication over geographically dispersed dual data centers via CWDM
• C. synchronous replication over dual data centers via Metro Ethernet
• D. synchronous replication over geographically dispersed dual data centers via MPLS

Correct answer: D

Explanation

The correct answer is D because synchronous replication ensures that data is consistently replicated in real time, which is essential for meeting the RPO requirement of less than 1 hour. Options A and B use asynchronous replication, which does not meet the RPO criteria, while option C, while synchronous, does not account for geographical dispersion, making it unsuitable for disaster recovery.