Which port and protocol is commonly used by MQTT in plain form?

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Study for the CPSA Port Numbers Exam. Practice with flashcards and multiple choice questions, each with hints and explanations. Get ready for your test!

Multiple Choice

Which port and protocol is commonly used by MQTT in plain form?

Explanation:
MQTT is a lightweight publish/subscribe protocol that runs over TCP, and the standard port for plain (unencrypted) MQTT traffic is 1883. This is the commonly used default so clients and brokers can connect without encryption. When TLS is used, the default port is typically 8883. The other ports listed are standard for database servers (1433 for SQL Server, 3306 for MySQL, 5432 for PostgreSQL) and are not associated with MQTT.

MQTT is a lightweight publish/subscribe protocol that runs over TCP, and the standard port for plain (unencrypted) MQTT traffic is 1883. This is the commonly used default so clients and brokers can connect without encryption. When TLS is used, the default port is typically 8883. The other ports listed are standard for database servers (1433 for SQL Server, 3306 for MySQL, 5432 for PostgreSQL) and are not associated with MQTT.

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