Selected MCQ

Current Question
Why are default passwords on IoT devices a security risk?
  • A. They usually use very complex, unbreakable codes
  • B. They are often published publicly or are easy to guess
  • C. They automatically update monthly
  • D. They encrypt network traffic
Correct Answer: B
Explanation:
Many IoT devices ship with default credentials, which attackers can easily exploit if not changed.
Related Question 1
Which network tech supports many IoT devices over long ranges?
  • A. Wi-Fi 6
  • B. LoRaWAN
  • C. Bluetooth 5.0
  • D. Ethernet
Correct Answer: B
Explanation:
LoRaWAN is designed for long-range, low-power IoT sensor communications.
Related Question 2
Which technology is used for secure, short-range wireless communication in IoT devices?
  • A. Wi-Fi
  • B. Bluetooth Low Energy (BLE)
  • C. Ethernet
  • D. 4G LTE
Correct Answer: B
Explanation:
Bluetooth Low Energy is a wireless protocol for low-power short-range communication.
Related Question 3
Which IoT protocol operates over UDP and is designed for constrained devices?
  • A. MQTT
  • B. HTTP
  • C. CoAP
  • D. FTP
Correct Answer: C
Explanation:
CoAP (Constrained Application Protocol) is a lightweight RESTful protocol for IoT over UDP.
Related Question 4
Which of these is a best practice for password security?
  • A. Writing passwords on sticky notes
  • B. Using multi-factor authentication
  • C. Reusing the same password everywhere
  • D. Sharing passwords with colleagues
Correct Answer: B
Explanation:
MFA (like combining a password with a code) greatly increases account security.
Related Question 5
What is a common use of a security certificate on websites?
  • A. To improve page speed
  • B. To prove domain ownership and enable HTTPS
  • C. To store user data
  • D. To track cookies
Correct Answer: B
Explanation:
SSL/TLS certificates authenticate website identity and enable encrypted HTTPS connections.