A company hired a security consultant to suggest a device that will protect its inbound HTTP traffic by immediately blocking security violations. Which of the following should the consultant most likely suggest?

An Intrusion Prevention System (IPS) is designed to detect and prevent identified threats by analyzing network traffic. However, it operates more broadly at the network level and is not specifically focused on protecting web applications and their HTTP traffic. Thus, it may not be the best choice for addressing specific web-based security violations directly.

An Intrusion Detection System (IDS) is primarily used for monitoring and analyzing traffic to detect potential threats without actively blocking them. While it can alert administrators about security violations, it does not provide the immediate blocking capability required for protecting inbound HTTP traffic, making it less suitable for this specific scenario.

A proxy server acts as an intermediary between clients and servers, providing functions such as content filtering and anonymity. However, it is not specifically designed to block security violations like a WAF. While it can help manage traffic, it does not focus on protecting web applications from specific threats in the way a WAF does.