Similar to Wi-Fi_Protected_Access
 - Network Control ProgramNetwork Control Protocol (ARPANET)
 - NMEA 0183NMEA 0183
 - NostrNostr
 - NVLinkNVLink
 - OMA LWM2MOMA LWM2M
 - OpenFlowOpenFlow
 - OSI参照モデルOSI model
 - Plesiochronous Digital HierarchyPlesiochronous digital hierarchy
 - ProfibusProfibus
 - Protocol Data UnitProtocol data unit
 - RcpRcp (Unix)
 - RFB ProtocolRFB (protocol)
 - RMI-IIOPRMI-IIOP
 - RolanetRolanet
 - Server Message BlockServer Message Block
 - SFlowSFlow
 - SNADSSNADS
 - STM-1STM-1
 - Synchronous Data Link ControlSynchronous Data Link Control
 - Synchronous Digital HierarchySynchronous digital hierarchy
 - Systems Network ArchitectureSystems Network Architecture
 - T.37T.37
 - T.38T.38
- Universal Plug and PlayUniversal Plug and Play
- Unix to Unix Copy ProtocolUUCP
 - V.92ITU-T V.92
 - Virtual Call
 - Virtual Local Area NetworkVLAN