A proxy firewall protects against which type of attack?
A . cross-site scripting attack
B . worm traffic
C . port scanning
D . DDoS attacks
Answer: A
Explanation:
Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications. XSS enables attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to bypass access controls such as the same-origin policy. Cross-site scripting carried out on websites accounted for roughly 84% of all security vulnerabilities documented by Symantec as of 2007.
Source: https://en.wikipedia.org/wiki/Cross-site_scripting
A proxy firewall is a network security system that protects network resources by filtering messages at the application layer. A proxy firewall may also be called an application firewall or gateway firewall. Proxy firewalls are considered to be the most secure type of firewall because they prevent direct network contact with other systems.
Source: http://searchsecurity.techtarget.com/definition/proxy-firewall
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