IPv4, IPv6 and connection protocols
Compare IPv4, IPv6 and dual-stack egress with observable HTTP/TLS protocols. A large-request test describes that request, not a definitive path MTU.
Using and interpreting this tool
Confirm the target and measurement point, then start the checks you need. Results retain sources, observation times and missing-data reasons. Traffic-intensive checks require a separate start.
After changing one setting, start a fresh run and compare A/B snapshots in history. Unknown, unconfigured and inapplicable do not mean passed.
Related tools and guides
Live measurements run in your browser after JavaScript loads. This introduction contains no visitor detection results.