Question: Suppose a client sends an HTTP request message with the If-modified-since: header. Suppose the object in a server has not changed since the last time

Suppose a client sends an HTTP request message with the If-modified-since: header. Suppose the object in a server has not changed since the last time a client retrieved the object. Then the server will send a response message with the status code: 200OK 400 Bad Request 304 Not Modified 404 Not Found

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