What is the purpose of a firewall?

• A. To enhance system speed
• B. To control traffic in a network
• C. To store large amounts of data
• D. To run applications smoothly

Answer: (B)

Firewalls are essential components of network security. Their primary purpose is to control the traffic that enters and exits a network. By monitoring and filtering incoming and outgoing data packets, firewalls help to establish a barrier between a trusted internal network and untrusted external networks, such as the internet. This control mechanism allows organizations to implement security policies that dictate which types of traffic are allowed or denied.

By using various rules and settings, firewalls can prevent unauthorized access and protect sensitive data from external threats while still allowing legitimate traffic to flow. This proactive approach to network security is crucial for safeguarding information and maintaining the integrity of networked systems.