Selected MCQ

Current Question
What protocol underlies most VPN technologies for secure remote connections?
  • A. SMTP
  • B. IPsec
  • C. HTTP
  • D. FTP
Correct Answer: B
Explanation:
IPsec is widely used to create secure virtual private network connections at the IP layer.
Related Question 1
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 2
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.
Related Question 3
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 4
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 5
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.