Which of the following keeps hackers from getting into a network by acting as a gateway?

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MP Vyapam Group 4 (Assistant Grade-3/Stenographer) Official Paper (Held On: 16 July, 2023 Shift 2)
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  1. Time bomb
  2. Firewall
  3. Worms
  4. Hackers

Answer (Detailed Solution Below)

Option 2 : Firewall
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Detailed Solution

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The correct answer is Firewall.

Key Points

  • A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization's previously established security policies.
    • The primary purpose of a firewall is to create a barrier between a trusted internal network and untrusted external networks, such as the Internet.
    • Firewalls can be hardware, software, or a combination of both.
    • They use a set of rules to control the incoming and outgoing traffic to protect the network from unauthorized access.
    • In essence, a firewall acts as a gateway, permitting or blocking data packets based on the security rules set up by the network administrator.
    • Besides preventing unauthorized access, firewalls can also log traffic and alert administrators about suspicious activities, contributing to the overall security posture of the network.

Additional Information

  • There are several types of firewalls, including packet-filtering firewalls, stateful inspection firewalls, proxy firewalls, and next-generation firewalls (NGFW).
  • Packet-filtering firewalls examine packets and allow or block them based on the source and destination addresses, ports, or protocols.
  • Stateful inspection firewalls track the state of active connections and make decisions based on the context of the traffic.
  • Proxy firewalls filter network traffic at the application level, providing additional security features such as content filtering and traffic monitoring.
  • Next-generation firewalls (NGFW) combine traditional firewall technology with additional functionalities like deep packet inspection (DPI), intrusion detection/prevention systems (IDS/IPS), and application awareness.
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