Performance and DNS

Verify TLS certificate renewal from scheduling and domain validation through deployment, public certificate checks and alerts before expiration occurs.

Preserve MX, SPF and DKIM during a website move, identify hidden mail dependencies, and verify incoming, staff and application email after cutover.

Estimate cloud egress from real data paths, transfer units, allowances and pricing rules, including CDN delivery, backups and cross-region services.

Compare hosting performance with equivalent setups, repeated tests, explicit cache states and valid transaction metrics instead of misleading benchmark claims.

Set Cache-Control for public pages, private content and versioned assets, then verify freshness, CDN overrides and safe separation between users.

Use regional website monitoring to separate DNS, TLS, network and application failures, design useful alerts, and verify recovery for affected visitors.

Read web server error logs during an outage by matching timestamps, requests and upstream symptoms, then verify the cause and preserve useful evidence.

Distinguish 502 and 504 errors, identify the gateway and upstream involved, and investigate connection failures, slow dependencies and timeout settings.

Verify Brotli and Gzip using real response headers and transfer sizes, check cache compatibility, and balance compression savings against server work.

Understand HTTP/2 and HTTP/3 hosting, verify the protocol visitors actually use, and separate transport improvements from application performance limits.