Which part of an email address indicates the specific domain or host mail server where the mailbox is located? MCQ with Answer and Explanation

Question
Which part of an email address indicates the specific domain or host mail server where the mailbox is located?
A. The subject line header
B. The text following the '@' symbol
C. The signature block
D. The text preceding the '@' symbol
Answer: Option B
Solution (By JKSSB Mock Tests)
In an email address format (username@domain.com), the part following the '@' symbol represents the target host domain or mail server.
This question belongs to: Computer Internet and Web Technologies
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Question #1
What is the standard network port number allocated for secure HTTPS traffic by default?
A. 8080
B. 143
C. 443
D. 80
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Correct Answer: Option C

Explanation:
Port 443 is the standard default network port used for secure web traffic over Hypertext Transfer Protocol Secure (HTTPS).
This question belongs to: Computer Internet and Web Technologies
Question #2
What is the purpose of the 'HTTP Strict Transport Security' (HSTS) header?
A. Both A and C
B. To enforce the use of HTTPS
C. To block HTTP requests
D. To redirect HTTP to HTTPS
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Correct Answer: Option A

Explanation:
HSTS tells the browser to always use HTTPS for a domain, preventing downgrade attacks and redirecting HTTP to HTTPS.
This question belongs to: Computer Internet and Web Technologies
Question #3
What does the 'target' attribute in an HTML tag specify?
A. The URL of the link
B. Where to open the linked document (e.g., new tab)
C. The relationship to the linked document
D. The media type
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Correct Answer: Option B

Explanation:
The target attribute defines where the linked document should be opened, such as _blank for a new tab or window.
This question belongs to: Computer Internet and Web Technologies
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