Which of the protocols are open and which are proprietary?

Open protocols are those that are publicly available and can be used and implemented by anyone without restrictions. Examples include HTTP, FTP, and TCP/IP. Proprietary protocols, on the other hand, are owned by a specific company or organization, and their specifications are not openly shared, limiting usage to licensed entities; examples include Microsoft's SMB and Apple's AFP. The distinction lies in the accessibility and control over the protocols' implementation and usage.