Hybrid Cloud Networking: Why Connectivity Is an Ongoing Architecture Problem

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Hybrid cloud networking presents distinct technical challenges that go beyond general infrastructure management, particularly in how on-premises systems connect to cloud environments. The choice between site-to-site VPN and dedicated connections such as AWS Direct Connect or Azure ExpressRoute carries real consequences for performance, security, and cost, and should be evaluated per workload rather than applied universally. Routing design is equally critical, as traffic can unnecessarily cross hybrid connections over time due to incremental migration decisions, adding latency and cost without architectural benefit. DNS consistency across both environments is another common failure point, as mismatched resolution behaviour can produce confusing and hard-to-diagnose errors. Treating hybrid connectivity as a one-time setup rather than a continuously managed architectural concern is identified as the root cause of most problems in this space.

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