| English | Welsh |
| Link Control Protocol | Protocol Rheoli Dolenni (A PPP control protocol that negotiates link and PPP parameters to dynamically configure the data-link layer of a PPP connection) |
| Transmission Control Protocol | Protocol Rheoli Trosglwyddo (The protocol within TCP/IP that governs the breakup of data messages into packets to be sent via IP, and the reassembly and verification of the complete messages from packets received by IP) |
| Transmission Control Protocol/Internet Protocol | Protocol Rheoli Trosglwyddo/Protocol Rhyngrwyd (A set of networking protocols widely used on the Internet that provides communications across interconnected networks of computers with diverse hardware architectures and various operating systems. TCP/IP includes standards for how computers communicate and conventions for connecting networks and routing traffic) |