What does a '502 Bad Gateway' HTTP status code return imply about a web link connection state?
A. One server on the internet received an invalid response from another edge server it accessed while attempting to fulfill the request.
B. The user's computer network cable is unplugged.
C. The client browser used an invalid or expired login session password.
D. The URL has been completely deleted and will never be recovered.
Answer: Option A
Solution (By JKSSB Mock Tests)
A 502 Bad Gateway error indicates that a gateway or proxy server on the network path received an invalid or unreadable response from the upstream backend server.
Explanation:
The 'Received' lines in an email header record each mail server node that processed and passed the message along, aiding in source verification.
What mechanism does an online streaming video channel implement over web connections to adjust video quality dynamically on the fly based on fluctuations in a user's real-time internet bandwidth?
A.Adaptive Bitrate Streaming (ABS)
B.Altering local hardware DNS settings dynamically
Explanation:
Adaptive Bitrate Streaming monitors network conditions and device performance in real time, shifting between higher and lower quality video streams to prevent playback buffering.
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