How many format used in protocol and what are it?

Protocols typically use various formats to structure data for communication. The most common formats include binary, text (such as JSON and XML), and specific protocol-defined formats (like HTTP, FTP, or MQTT). Each format serves different purposes, with binary formats being efficient for performance and text formats being more human-readable. The choice of format often depends on the requirements of the application and the environment in which the protocol operates.