Zombies Inc. is looking for ways to better protect their web servers from potential DoS attacks. Their web admin proposes the use of a network appliance that receives all incoming web requests and forwards them to the web server. He says it will prevent direct customer contact with the server and reduce the risk of DoS attacks. What appliance is he proposing?

The CEH exam is a 125-question multiple-choice exam. Candidates have four hours to complete the CEH exam.
Common CEH exam topics covered include: hacking methodologies, scanning methodologies, port scan types, and expected return responses. 
Knowing how to work with tools such as Nmap, Wireshark, Snort, OpenSSL, Netstat, and Hping will be handy.