A company launched a digital product that is selling so well that their web server is unable to keep up with the requests. They are evaluating the possibility of adding a second web server along with a load balancer. What type of load balancer should they add, and what security benefit can it provide?

Group of answer choices

Layer $4$ load balancer; it can filter traffic to prevent access to malicious websites based on the URL.

Layer $7$ load balancer; it can detect and prevent protocol attacks directed at the server.

Layer $7$ load balancer; it can detect and stop attacks directed at an application.

Layer $4$ load balancer; it can hide HTTP error pages or remove server headers from HTTP responses.