Selected MCQ

Current Question
In networking, what is a subnet mask used for?
  • A. Encrypting data packets
  • B. Determining the network portion of an IP address
  • C. Routing traffic across the internet
  • D. Assigning MAC addresses
Correct Answer: B
Explanation:
A subnet mask divides an IP address into network and host portions.
Related Question 1
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 2
What does SDN (Software Defined Networking) allow?
  • A. Hardware-only management
  • B. Dynamic network configuration via software control
  • C. Eliminating routers
  • D. Only static routing
Correct Answer: B
Explanation:
SDN separates control and data planes, enabling programmable network configurations.
Related Question 3
What is a 'digital twin' used for?
  • A. A backup of a database
  • B. A virtual model of a physical system for simulation
  • C. An identical computer router
  • D. Digital photography editing
Correct Answer: B
Explanation:
A digital twin is a software model that simulates a physical object or system.
Related Question 4
In IoT, what is MQTT primarily used for?
  • A. Hardware design
  • B. Lightweight messaging protocol
  • C. Database management
  • D. Encryption standard
Correct Answer: B
Explanation:
MQTT is a lightweight publish/subscribe messaging protocol widely used in IoT.
Related Question 5
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.