Which HTTP status code indicates a client error (bad request)?
A. 401
B. 403
C. 404
D. 400
Answer: Option D
Solution (By JKExamLibrary)
400 Bad Request indicates that the server cannot process the request due to malformed syntax or invalid parameters. 401 is Unauthorized, 403 Forbidden, 404 Not Found.
Explanation:
The 'Received' lines in an email header record each mail server node that processed and passed the message along, aiding in source verification.
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