CompTIA Cloud+ (CV0-004)DeploymentHard
A cloud architect is designing a disaster recovery strategy for a critical application that must have near-zero RTO (Recovery Time Objective) and RPO (Recovery Point Objective). The application runs across multiple regions, and data must be continuously synchronized across these regions. Which network deployment strategy is crucial for enabling this level of cross-region data synchronization and application availability?
- AGlobal Load Balancer
- BContent Delivery Network (CDN)
- CVirtual Private Network (VPN) gateway
- DDirect Connect / ExpressRoute
Show answer & explanationAnswer & explanation
Correct answer: D. Direct Connect / ExpressRoute
Direct Connect (AWS) or ExpressRoute (Azure) provides a dedicated, private network connection between on-premises data centers and cloud providers, or between different cloud regions. This dedicated, high-bandwidth, low-latency connection is crucial for continuous data synchronization and achieving near-zero RTO/RPO for critical applications deployed across multiple regions.
Why the other options are wrong
- A. A global load balancer distributes user traffic across multiple regions, contributing to RTO by directing users to healthy regions, but it doesn't provide the underlying dedicated network for continuous data synchronization (RPO).
- B. A CDN caches content at edge locations to improve delivery speed to users, but it's not designed for continuous, synchronous data synchronization between application regions.
- C. VPN gateways provide secure connections over the public internet, which may not offer the consistent high bandwidth and low latency required for near-zero RPO/RTO cross-region synchronization.
Direct Connect / ExpressRoute
Cloud services (AWS Direct Connect, Azure ExpressRoute) that establish a dedicated, private network connection from an on-premises data center or a co-location environment to a cloud provider's network.
- Provides consistent high bandwidth and lower latency than internet-based VPNs.
- Crucial for hybrid cloud architectures and cross-region data synchronization.
- Offers enhanced security and reliability.
Memory trick: Direct Connect links regions fast, VPNs are over the internet, CDNs cache, GLBs route users.