Browsers often try this UDP-based protocol on port 443 first, but Microsoft Entra Internet Access can't tunnel it. Switching it off in the browser forces a fallback to ordinary HTTPS over TCP.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains QUIC in context, with comparison tables and the common traps.
Terms in this definition
- FIRST
A DAX function available only inside visual calculations. It fetches the value at the start of one axis of the visual's matrix, which makes it handy for comparing each point with the first; its opposite is LAST.
- Microsoft Entra Internet Access
A secure web gateway within Global Secure Access that knows who the user is. Security profiles tied to Conditional Access decide which websites and SaaS services are allowed, judged by FQDN or category, and ports beyond the default 80 and 443 can be captured with custom rules.
- HTTPS
Secure HTTP, wrapped in TLS. VCF products serve their web UIs and REST APIs this way on 443.
- OVER
Gives a T-SQL window function its window: PARTITION BY, ORDER BY and, if wanted, a ROWS or RANGE frame. Rankings and running totals can then be worked out while every row is kept.
- TCP
A transport protocol that is connection-oriented.
Related terms
- SMB over QUIC
Carries SMB inside QUIC, using UDP port 443 and TLS 1.3, so people can reach file shares safely with no VPN. Every edition of Windows Server 2025 includes it, as does Windows Server 2022 Datacenter: Azure Edition.