Networking

DNS TTLs and failover: how to test recovery

Separate health detection, cached DNS answers and client recovery. Use dig and curl to check a planned cutover and find where failover stalls.

🌐 Networking 2mos ago

How CDNs Improve Uptime and Absorb Traffic Spikes

A practical look at how content delivery networks reduce single-origin risk, handle sudden load surges, and fit into a reliability-focused architecture.