Selected MCQ

Current Question
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 1
Which technology helps secure communications using quantum mechanics?
  • A. Quantum key distribution (QKD)
  • B. Standard VPN
  • C. Hashing
  • D. WPA2
Correct Answer: A
Explanation:
QKD uses quantum particles to securely share encryption keys, with eavesdropping detectable.
Related Question 2
What protocol is lightweight and commonly used for machine-to-machine communication in IoT devices?
  • A. HTTP
  • B. MQTT
  • C. FTP
  • D. SSH
Correct Answer: B
Explanation:
MQTT is a lightweight publish/subscribe protocol ideal for IoT sensors with low bandwidth.
Related Question 3
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 4
Which protocol is used to transfer files over SSH securely?
  • A. FTPS
  • B. HTTPS
  • C. SCP (Secure Copy)
  • D. SMTP
Correct Answer: C
Explanation:
SCP (Secure Copy Protocol) is used to transfer files securely over an SSH connection.
Related Question 5
Which protocol is used to encrypt web traffic between a browser and a server securely?
  • A. FTP
  • B. HTTP
  • C. TLS
  • D. SMTP
Correct Answer: C
Explanation:
TLS (Transport Layer Security) provides encryption for HTTPS traffic.