Scalable High Availability Cloud Connectivity Design
A company has strict service-level agreements and requires high availability and resiliency between its on-premises data center and the public cloud. Which scalable connectivity design meets these requirements?
Community Insight
The exam tests the distinction between basic transit VPC connectivity and advanced SD-WAN-based cloud gateways, specifically targeting the trap of choosing dedicated MPLS over scalable, software-defined solutions for 'scalable' and 'resilient' requirements.
This question evaluates the selection of a scalable cloud connectivity design that ensures high availability and resiliency between on-premises data centers and public clouds. The correct answer leverages Cisco Catalyst SD-WAN capabilities to meet strict SLA requirements.
Candidates often select Option B (MPLS) because it is traditionally associated with reliability, but they overlook the 'scalable' keyword which favors the flexible, automated nature of SD-WAN Cloud Gateways over rigid hardware-centric leased lines.
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Expert Analysis
Why the Answer Is Correct
Option D is the correct choice because the Cloud OnRamp for Multicloud SD-WAN cloud gateway provides a highly available, resilient, and scalable architecture. By utilizing the SD-WAN fabric, organizations can dynamically manage connectivity to multiple IaaS providers (AWS, Azure, GCP) with built-in redundancy and intelligent path selection, directly satisfying the requirement for high availability and scalability.Why the Other Options Are Wrong
Option A (Cloud OnRamp for IaaS transit VPC) offers connectivity but lacks the full SD-WAN integration and global load balancing features that make Option D more robust for multi-cloud resilience. Option B (MPLS) is not inherently 'scalable' in the modern cloud sense; provisioning new circuits is slow and expensive compared to the elastic nature of SD-WAN. Option C (Multicloud branch connect) typically refers to connecting branches to the cloud, whereas the scenario specifies an on-premises data center requiring high-level resiliency best served by the dedicated Cloud Gateway feature.Community Comment Notes
Community feedback strongly supports Option D as the superior solution for meeting strict SLAs through scalable means. As user Helloory noted, "D is the best answer," highlighting its alignment with modern SD-WAN cloud strategies.Exam Strategy
When questions emphasize 'scalability' alongside 'high availability' in cloud contexts, prioritize Software-Defined Wide Area Network (SD-WAN) solutions over traditional hardware-based networks like MPLS. Look for keywords like 'cloud gateway' or 'OnRamp' which indicate integrated, automated management capabilities.
Frequently Asked Questions
Why is MPLS not considered scalable here?
MPLS requires manual provisioning for each circuit, making it rigid and slow to scale compared to the automated, elastic nature of SD-WAN cloud gateways.
What is the difference between Transit VPC and SD-WAN Cloud Gateway?
Transit VPC connects to a single provider's hub, while SD-WAN Cloud Gateway integrates with the SD-WAN fabric for centralized policy, monitoring, and multi-cloud redundancy.