Similar to Gopher

Endpoint Handlespace Redundancy Protocol

Finger (protocol)

FTPS

ICalendar

Internationalized Resource Identifier

Internet Control Message Protocol

Internet Group Management Protocol

Integrated services

IS-IS

Layer 2 Tunneling Protocol

Line Printer Daemon protocol

Link Control Protocol

Multiprotocol Label Switching

Multicast Listener Discovery

Online Certificate Status Protocol

Point-to-Point Protocol

RADIUS

Request for Comments

Reverse Address Resolution Protocol

Berkeley r-commands

Simple Authentication and Security Layer

Stream Control Transmission Protocol

Syslog

User Datagram Protocol

Cryptographic Message Syntax

Neighbor Discovery Protocol

Tor (network)

Percent-encoding