Which specific email header field identifies the chain of server hosts that routed a message from origin to its final endpoint mailbox destination? MCQ with Answer and Explanation
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Question #1
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What is the default port number for HTTP?
Correct Answer: Option B
Explanation:
Port 80 is the default port for HTTP communication. Port 443 is for HTTPS, port 21 for FTP, and port 25 for SMTP.
Port 80 is the default port for HTTP communication. Port 443 is for HTTPS, port 21 for FTP, and port 25 for SMTP.
This question belongs to:
Computer
Internet and Web Technologies
Question #2
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Which network component acts as an intermediary gateway or buffer between a local computer client and the broader internet, often used to cache requests or hide client IPs?
Correct Answer: Option C
Explanation:
A proxy server receives client requests, intercepts them, masks the source identity, and relays them to destination servers across the web.
A proxy server receives client requests, intercepts them, masks the source identity, and relays them to destination servers across the web.
This question belongs to:
Computer
Internet and Web Technologies
Question #3
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Which specific protocol is built over internet stacks to manage the automated transmission of real-time text alert states inside Internet of Things (IoT) hardware over limited bandwidth links?
Correct Answer: Option B
Explanation:
MQTT is a lightweight publish-subscribe network protocol designed to transmit messages between constrained IoT devices over low-bandwidth or unreliable networks.
MQTT is a lightweight publish-subscribe network protocol designed to transmit messages between constrained IoT devices over low-bandwidth or unreliable networks.
This question belongs to:
Computer
Internet and Web Technologies
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