Similar to DIAMETER

RADIUS

Simple Authentication and Security Layer

Exterior Gateway Protocol

Endpoint Handlespace Redundancy Protocol

Kerberos (protocol)

Border Gateway Protocol

HTTP cookie

Interactive Connectivity Establishment

Internationalized Resource Identifier

Internet Control Message Protocol

Automatic Certificate Management Environment

DNS over HTTPS

Domain Name System Security Extensions

Transport Layer Security

Cryptographic Message Syntax

Tor (network)

Bootstrap Protocol

Classless Inter-Domain Routing

Finger (protocol)

Lightweight Directory Access Protocol

Link Control Protocol

NETCONF

Online Certificate Status Protocol

Berkeley r-commands

Session Description Protocol

Syslog

Challenge-Handshake Authentication Protocol

NTLM