(ISC)2 Certified in Cybersecurity Practice Exam

Which device is best suited to separate a network into multiple distinct security zones?

1. IPS

2. Router

3. Switch

4. Firewall

The correct answer is: Firewall

A firewall is best suited to separate a network into multiple distinct security zones because it is specifically designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. Firewalls can create different security zones by establishing boundaries between different segments of a network and applying specific policies for each zone. This is vital for protecting sensitive data and systems by ensuring that only authorized traffic is allowed to pass between the zones. When a firewall is implemented, it can segment a network so that traffic between different areas of the network is tightly controlled and monitored. For example, an organization may have a public-facing zone for internet traffic, a zone for its internal operations, and a secure zone for sensitive data. The firewall enforces rules on what traffic can traverse between these zones, effectively compartmentalizing and safeguarding the network. Devices like routers, switches, or intrusion prevention systems (IPS) have distinct roles that do not focus primarily on managing security zones. While routers can segment networks and provide some basic packet filtering capabilities, they lack the extensive security features necessary for effective zone separation that firewalls provide. Switches primarily handle traffic within the same network and do not offer the security features needed to separate zones effectively. IPS devices monitor malicious activity and can take action against certain attacks,