MQTT over TLS (MQTTS) in IOT Protocols - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the MQTT broker URL with TLS.

IOT Protocols

mqtt_client.connect("[1]")

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Amqtt://broker.example.com

Bmqtts://broker.example.com

Chttp://broker.example.com

Dtcp://broker.example.com

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'mqtt://' which is not secure

Using 'http://' which is for web protocols

Using 'tcp://' which is not specific to MQTT

The prefix 'mqtts://' is used to connect to an MQTT broker over TLS, ensuring encrypted communication.

2fill in blank

medium

Complete the code to set the TLS certificate file path for the MQTT client.

IOT Protocols

mqtt_client.tls_set(ca_certs="[1]")

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A/etc/ssl/certs/ca.pem

B/tmp/mqtt.sock

C/home/user/mqtt_config.txt

D/var/log/mqtt.log

Attempts:

3 left

💡 Hint

Common Mistakes

Using a log file path instead of a certificate

Using a config text file path

Using a socket file path

The 'ca_certs' parameter requires the path to the CA certificate file to verify the broker's identity.

3fill in blank

hard

Fix the error in the code to enable TLS for the MQTT client.

IOT Protocols

mqtt_client.[1](tls_version=ssl.PROTOCOL_TLSv1_2)

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Aset_tls

Benable_tls

Ctls_set

Dstart_tls

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like 'enable_tls' or 'start_tls'

Using 'set_tls' which is incorrect

The correct method to configure TLS settings in the MQTT client is 'tls_set'.

4fill in blank

hard

Fill both blanks to configure the MQTT client with username and password for secure connection.

IOT Protocols

mqtt_client.username_pw_set(username="[1]", password="[2]")

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Auser123

Bpass123

Cadmin

Dguest

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing username and password values

Using default or guest credentials

The username is set to 'user123' and the password to 'pass123' for authentication.

5fill in blank

hard

Fill all three blanks to create a dictionary for TLS settings including certificate, key, and TLS version.

IOT Protocols

tls_settings = {"ca_certs": "[1]", "certfile": "[2]", "tls_version": [3], "keyfile": "[4]"}

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A/etc/ssl/certs/ca.pem

B/etc/ssl/certs/client.crt

Cssl.PROTOCOL_TLSv1_2

D/etc/ssl/private/client.key

Attempts:

3 left

💡 Hint

Common Mistakes

Using key file path as certfile

Using incorrect TLS version constant

Mixing file paths

The CA certificate, client certificate, client key, and TLS version are correctly set for secure MQTT connection.