What is a POST request?

• A. Sending data to a server
• B. Requesting data from a server
• C. Retrieving a resource
• D. Handshake with server

Answer: (A)

HTTP methods define the action the client wants the server to perform. A POST request is used when the client sends data to the server, typically in the body of the HTTP request. This is how forms are submitted, file uploads happen, and API calls that create or update resources are carried out. You’ll often see a POST line like "POST /path HTTP/1.1" followed by headers such as Content-Length and Content-Type, and then the data payload. In contrast, a request that asks the server to return data is a retrieval operation (often using GET). A handshake with the server refers to the initial TCP/TLS handshake that establishes the connection, not the HTTP action of sending data. Therefore, the correct description is sending data to a server.