Similar to SMTPS

XCal

CardDAV

VP8

Opus (audio format)

KCipher-2

Real-Time Media Flow Protocol

HTTP

Constrained Application Protocol

Virtual Extensible LAN

JSON Web Token

HTTP/2

IPv4 Residual Deployment

HTTP 451

Curve25519

Curve448

Markdown

Brotli

GeoJSON

DNS over HTTPS

Automatic Certificate Management Environment

Zstd

QUIC

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