301B Question #165: Real Exam Question with Answer & Explanation

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Question

A client is attempting to log in to a web application that requires authentication. The following HTTP headers are sent by the client:

GET /owa/ HTTP/1.1
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=
User-Agent: curl/7.26.0
Host: 10.10.0.14
Accept: */*
Accept-Encoding: gzip,deflate

The web server is responding with the following HTTP headers:

HTTP/1.1 401 Unauthorized
Content-Type: text/html
Server: Microsoft-IIS/7.5
WWW-Authenticate: NTLM
Date: Wed, 16 Aug 1977 19:12:31 GMT
Content-Length: 1293

The client has checked the login credentials and believes the correct details are being entered. What is the reason the destination web server is sending an HTTP 401 response?

Options

AThe username and password are incorrect.
BThe server has an incorrect date configured.
CThe client is using the wrong type of browser.
DThe wrong authentication mechanism is being used.

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