Overview
Network security involves protecting the integrity, confidentiality, and availability of data transmitted across networks. It includes hardware, software, and policies to safeguard against cyber threats.
Key Components
- Firewalls: Monitor and control incoming/outgoing traffic.
- IDS/IPS: Detect and prevent malicious activities.
- VPNs: Provide secure remote communication.
- Zero Trust: Never trust, always verify approach to access control.
Real-World Example
A properly configured firewall prevented WannaCry ransomware from spreading across networks in some organizations in 2017.
Best Practices
- Segment networks to minimize attack surfaces.
- Regularly patch routers, switches, and servers.
- Use intrusion detection and prevention systems (IDS/IPS).
- Train employees on safe network usage.