Cisco Cyber Security Practice Exam

What kind of firewall screens out undesirable content based on specified content patterns?

1. Stateful firewall

2. Content-filtering firewall

3. Next-generation firewall (NGFW)

4. Web application firewall (WAF)

The correct answer is: Content-filtering firewall

A content-filtering firewall evaluates and screens internet content based on pre-defined rules and patterns. Its primary function is to control the access of users to specific types of content, such as websites or applications that may pose security threats or are not appropriate for certain environments. By analyzing the content and comparing it against a set of criteria or known patterns, this type of firewall can effectively block or allow access, ensuring that only desired content is delivered to users. This approach differs from other types of firewalls like stateful firewalls, which focus on tracking the state of active connections and making decisions based on the context of the traffic flow. Next-generation firewalls (NGFWs) go beyond simple packet filtering and stateful inspection by incorporating multiple functions, such as intrusion prevention and application awareness, but may not specifically center on content patterns alone. Similarly, web application firewalls (WAFs) provide security specifically for web applications by filtering and monitoring HTTP traffic, but their focus is more on the application layer to protect against threats like SQL injection rather than broader content filtering.