Which of the following is a valid IPv4 address? MCQ with Answer and Explanation

Question
Which of the following is a valid IPv4 address?
A. 192.168.1.1.1
B. 192.168.1
C. 300.168.1.1
D. 192.168.1.1
Answer: Option D
Solution (By JKSSB Mock Tests)
An IPv4 address consists of four octets (0-255) separated by dots. 192.168.1.1 is valid. 300 is invalid, and the others have incorrect structure.
This question belongs to: Computer Internet and Web Technologies
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Question #1
What is the purpose of the 'User-Agent' header in HTTP requests?
A. To authenticate the user
B. To specify the preferred language
C. To identify the client software making the request
D. To provide the user's IP address
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Correct Answer: Option C

Explanation:
The User-Agent header allows the server to identify the type of browser, operating system, and version, enabling content adaptation.
This question belongs to: Computer Internet and Web Technologies
Question #2
Which of the following is a content delivery network (CDN) service?
A. AWS S3
B. Dropbox
C. Google Drive
D. CloudFlare
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Correct Answer: Option D

Explanation:
CloudFlare is a CDN and reverse proxy service that distributes content from geographically distributed servers to improve speed and security.
This question belongs to: Computer Internet and Web Technologies
Question #3
Which of the following is an example of a dynamic web page technology?
A. Server-side includes (SSI)
B. All of the above
C. PHP
D. ASP.NET
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Correct Answer: Option B

Explanation:
SSI, PHP, and ASP.NET are all server-side technologies used to generate dynamic content.
This question belongs to: Computer Internet and Web Technologies
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