Cisco 300-915 Online Practice Questions and Exam Preparation

Cisco 300-915 Online Questions & Answers

• Question 21:

  

  Refer to the exhibit. Based on the MQTT client output, which action should be taken so that the connection to the broker can be established?

  A. Change the username/password.
  B. Open port 1883 on the network firewall.
  C. Change the IP address of the broker.
  D. Add the certificate.
  A. Change the username/password.

• Question 22:

  

  Refer to the exhibit. Which product must be positioned where the "?" is placed to connect these different network levels?

  A. firewall
  B. switch
  C. router
  D. wireless access port
  C. router

• Question 23:

  

  Refer to the exhibit. Which two statements are true? (Choose two.)

  A. That is a heatmap projected on top of a geographic map.
  B. That is a treemap projected on top of a geographic map.
  C. The color red usually stands for lower values and the color blue usually stands for higher values.
  D. Another suitable visualization technique for this image would be line graphs.
  E. The color blue usually stands for lower values and the color red usually stands for higher values.
  A. That is a heatmap projected on top of a geographic map.
  E. The color blue usually stands for lower values and the color red usually stands for higher values.

• Question 24:

  Which data visualization technique should be used to represent an important single metric on a dashboard?

  A. heatmap
  B. scatter pot
  C. gauge
  D. treemap
  C. gauge

• Question 25:

  DRAG DROP

  The network team of a large international airport is creating a sensor network on their site using the Cisco LoRaWAN solution. Drag and drop the actions from the left to right needed to implement this project. Not all options are used.

  Select and Place:

  

  

• Question 26:

  

  Refer to the exhibit. Which two statements about data flow are true? (Choose two.)

  A. Another AMQP broker should be implemented on the customer cloud.
  B. Instead of AMQP, MQTT should be used for compatibility issues in a cloud-to-cloud connection.
  C. A VPN tunnel is not necessary because the MQTT payload is encrypted by default.
  D. The gateway must stay constantly connected to the Kinetic cloud to avoid blank data sets, even when using caching functions.
  E. The Python application could use the paho-mqtt library.
  B. Instead of AMQP, MQTT should be used for compatibility issues in a cloud-to-cloud connection.
  E. The Python application could use the paho-mqtt library.

• Question 27:

  When an RS232 device is connected to a Cisco IR829 router, the data collected is not being parsed correctly by the edge application.

  Which two steps should be taken to troubleshoot the issue? (Choose two.)

  A. SSH access on the Cisco IR829 router must be enabled for IOx Guest OS.
  B. Communication mode must be set to half duplex over serial connection.
  C. Serial cable length should not exceed 1.5 meters.
  D. Ensure that communication parameters like baud rate and parity are set correctly.
  E. Set the cable connections based on the PIN layout from the sensor vendor.
  D. Ensure that communication parameters like baud rate and parity are set correctly.
  E. Set the cable connections based on the PIN layout from the sensor vendor.

• Question 28:

  An IoT engineer is responsible for security at an organization. Humans and machines need to be allowed to access services like database or compute on AWS. The engineer decides to implement dynamic secrets. Which method helps to get this implementation accurate from a security point of view?

  A. Create a central secret system for humans and machine to obtain very short-lived dynamic secrets to access any service.
  B. Humans cannot be trusted, and each time they authenticate they should be issued with dynamic secrets. Machines can be trusted, and they can be issued with static credentials.
  C. Maintain a different service associated to secret systems to issue access.
  D. After a user is authenticated by any trusted system, the user can be trusted to use any service.
  A. Create a central secret system for humans and machine to obtain very short-lived dynamic secrets to access any service.

• Question 29:

  As part of an IoT project, an organization is developing an application that will share multiple clients using a REST API.

  Based on the software development process, what are two valid technical activities that can be suggested to secure the REST API that is developed during the development of the software? (Choose two.)

  A. Respond to request failures in detail to allow users for easier troubleshooting.
  B. Implement HTTP whitelisting to only methods that are allowed.
  C. Implement and review audit logs for security-related events.
  D. Reject HTTP methods that are invalid with an error code 404.
  E. Implement physical firewalling and access control to the resources.
  B. Implement HTTP whitelisting to only methods that are allowed.
  D. Reject HTTP methods that are invalid with an error code 404.

• Question 30:

  

  Refer to the exhibit. When a Docker image is built using this Dockerfile, which two statements are valid on Cisco IOx 1.8 and before? (Choose two.)

  A. It builds an image that can be executed on all Cisco platforms.
  B. It builds a Docker image that cannot be used directly on Cisco IOx.
  C. It compiles a "hello world" program in C.
  D. It creates two separate images.
  E. It builds an IOx package that can be deployed directly.
  B. It builds a Docker image that cannot be used directly on Cisco IOx.
  C. It compiles a "hello world" program in C.