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Which of the following is the system designed to prevent unauthorised access to or from a private network?
Question

Which of the following is the system designed to prevent unauthorised access to or from a private network?

A.

Repeater

B.

Packet filter

C.

Bridge

D.

Firewall

Correct option is D

The correct answer is: (D) Firewall
Explanation:
A firewall is a security system designed to prevent unauthorized access to or from a private network. It acts as a barrier between a trusted internal network and untrusted
external networks (such as the internet), monitoring and controlling incoming and outgoing network traffic based on predefined security rules.
Information Booster:
  • Firewalls can be hardware-based, software-based, or a combination of both.
  • They filter traffic based on IP addresses, ports, and protocols.
  • Types of firewalls include Packet Filtering Firewalls, Stateful Inspection Firewalls, and Proxy Firewalls.
  • Firewalls help prevent cyberattacks, hacking attempts, and unauthorized data access.
  • Modern firewalls incorporate Intrusion Detection and Prevention Systems (IDPS) for enhanced security.
Additional Information:
  • Repeater : A network device that amplifies and retransmits signals to extend the range of a network.
  • Packet Filter : A type of firewall that examines packets based on rules.
  • Bridge : A networking device that connects two or more network segments.

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