_________ is a technique used to prevent unauthorized access to a network by filtering incoming and outgoing traffic.
- Firewall
- IDS/IPS
- Proxy Server
- VPN
A firewall is a network security device or software application that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet. Firewalls inspect network packets and block or allow them based on defined security policies, helping to prevent unauthorized access, data breaches, and other cyber threats.
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