Characteristics of application firewalls include all of the following except:1 pointProxies traffic rather than permitting direct communication between hostsCan be used to implement strong user authenticationMasks the internal network from untrusted networksIs extremely fast and has no impact on network performance

Sure, let's analyze the characteristics of application firewalls step by step to identify the one that does not belong:

1. Proxies traffic rather than permitting direct communication between hosts:

   • Application firewalls often act as intermediaries, or proxies, between the internal network and external networks. This means they inspect and filter traffic before it reaches its destination, rather than allowing direct communication between hosts.

2. Can be used to implement strong user authentication:

   • Application firewalls can enforce strong user authentication by requiring users to verify their identity before accessing certain applications or services. This adds an additional layer of security.

3. Masks the internal network from untrusted networks:

   • By acting as a proxy, application firewalls can hide the details of the internal network from external entities. This helps in protecting the internal network from potential attackers.

4. Is extremely fast and has no impact on network performance:

   • This statement is generally not true for application firewalls. Because they inspect and filter traffic at the application layer, they can introduce latency and impact network performance. Application firewalls are typically not known for being extremely fast or having no impact on performance.

Based on the analysis, the characteristic that does not belong is:

Is extremely fast and has no impact on network performance.