Similar to WHOIS

Simple Network Management Protocol

Simple Mail Transfer Protocol

Telnet

Time Protocol

Transport Layer Security

Service Location Protocol

DNS zone

Time-based one-time password

Application layer

9P (protocol)

Advanced Message Queuing Protocol

Apache Avro

Apache Thrift

Direct Client-to-Client

DHCP snooping

DNS over TLS

Exchange ActiveSync

XML

Gemini (protocol)

HTTPS

Internet Message Access Protocol

InterPlanetary File System

JSON-RPC

Model Context Protocol

MQTT

Nano (cryptocurrency)

Open Charge Point Protocol