Selected MCQ

Current Question
What is the purpose of a firewall in network security?
  • A. To block unauthorized access based on rules
  • B. To store sensitive data
  • C. To physically connect network cables
  • D. To encrypt Wi-Fi connections
Correct Answer: A
Explanation:
Firewalls monitor and filter incoming/outgoing network traffic using security rules.
Related Question 1
In network security, what does a DMZ (demilitarized zone) refer to?
  • A. A private office
  • B. An isolated subnet for public-facing servers
  • C. A type of malware
  • D. A strong encryption method
Correct Answer: B
Explanation:
A DMZ is a separate network area that isolates public services (e.g., web servers) from the internal LAN.
Related Question 2
What is the main purpose of the Domain Name System (DNS) in computer networks?
  • A. Encrypting data on the network
  • B. Translating domain names to IP addresses
  • C. Routing data packets
  • D. Synchronizing time among servers
Correct Answer: B
Explanation:
DNS translates human-readable domain names to IP addresses used by computers.
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
What allows dynamic network configuration in emerging tech?
  • A. Hardware-only management
  • B. Software Defined Networking (SDN)
  • C. Analog cables
  • D. Static routing only
Correct Answer: B
Explanation:
SDN separates control and data planes, enabling programmable network configurations.
Related Question 5
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.