Similar to Exterior_Gateway_Protocol

Reverse Address Resolution Protocol

Simple Network Management Protocol

Stream Control Transmission Protocol

Telnet

Transport Layer Security

Type–length–value

Uniform Resource Identifier

User Datagram Protocol

Cryptographic Message Syntax

Ephemeral port

Neighbor Discovery Protocol

Tor (network)

Network Time Protocol

Percent-encoding

Portmap

Automatic Certificate Management Environment

DNS over HTTPS

HMAC-based one-time password

Internet Protocol Control Protocol

Internet Storage Name Service

OAuth

Point-to-Point Tunneling Protocol

QUIC

Quoted-printable

Real-Time Media Flow Protocol

Serial Line Internet Protocol

Session Announcement Protocol

SOCKS