EC-Council Certified Security Analyst (ECSA v10) — Question 19

An employee is trying to access the internal website of his company. When he opened a webpage, he received an error message notifying `Proxy Authentication
Required.` He approached the IT department in the company and reported the issue. The IT staff explained him that this is an HTTP error indicating that the server is unable to process the request due to lack of appropriate client's authentication credentials for a proxy server that is processing the requests between the clients and the server.
Identify the HTTP error code corresponding to the above error message received by the employee?

Answer options

• A. 415
• B. 417
• C. 407
• D. 404

Correct answer: C

Explanation

The correct answer is C, 407, which specifically indicates that proxy authentication is required. Option A (415) refers to unsupported media type, B (417) signifies expectation failed, and D (404) denotes not found, none of which relate to authentication requirements for a proxy server.