What is the function of the 'User-Agent' string sent inside an HTTP request header to a remote web server? MCQ with Answer and Explanation

Question
What is the function of the 'User-Agent' string sent inside an HTTP request header to a remote web server?
A. To specify the physical routing coordinates of the local ISP link
B. To identify the specific browser application, version, and operating system of the client to the server
C. To check local hardware device temperature metrics
D. To transmit the user's encrypted master system password
Answer: Option B
Solution (By JKSSB Mock Tests)
The User-Agent header string acts as a technical badge, telling the web server what browser software and operating system the client is using so it can tailor content compatibility.
This question belongs to: Computer Internet and Web Technologies
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Question #1
Which of the following is a method of web authentication that uses a combination of username and password?
A. Digest authentication
B. Basic authentication
C. Both Basic and Digest
D. Bearer token
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Correct Answer: Option C

Explanation:
Both Basic and Digest authentication are HTTP authentication schemes that rely on username/password, though they differ in security.
This question belongs to: Computer Internet and Web Technologies
Question #2
Which of the following web browser features allows users to open and switch between multiple web pages within a single application window?
A. Bookmarking
B. History Pane
C. Extensions Engine
D. Tabbed Browsing
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Correct Answer: Option D

Explanation:
Tabbed browsing enables multiple web pages to be loaded simultaneously within distinct tabs inside the exact same window frame.
This question belongs to: Computer Internet and Web Technologies
Question #3
Which standard cryptographic protocol is most commonly used to establish an encrypted and secure link between a web browser and a web server in modern HTTPS implementations?
A. PPTP
B. SSH
C. TLS
D. SFTP
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Correct Answer: Option C

Explanation:
Transport Layer Security (TLS) is the modern cryptographic protocol that has succeeded Secure Sockets Layer (SSL) to secure HTTP communications over HTTPS.
This question belongs to: Computer Internet and Web Technologies
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