A high volume of HTTP, GET, and POST requests are hitting a company web server, which is causing a DoS attack for legitimate services. Which of the following solutions would most likely mitigate this attack?

Access Control Lists (ACLs) are used to define permissions for users and systems regarding what they can access or execute. While they can restrict user access, they are not designed to handle high volumes of incoming traffic. Thus, ACLs would not effectively mitigate a DoS attack that overwhelms a server with HTTP requests.

A load balancer distributes incoming network traffic across multiple servers to ensure no single server becomes overwhelmed. While this can help manage traffic loads, it does not inherently protect against malicious HTTP requests that could still flood the servers. Therefore, it would not be the most effective solution for mitigating a DoS attack.

An Intrusion Prevention System (IPS) detects and reacts to potential threats on a network. Although it can block known malicious traffic, it may not be as effective against a high volume of legitimate-looking requests that constitute a DoS attack. Thus, it may not adequately protect the web server from being overwhelmed.