Aweb application firewall protects web servers from malicious traffic and blocks attempts to compromise the system. it prevents targeted attacks that include denial of service (dos), cross-site scripting (xss), sql injection, cross-site request forgery (csrf), forceful browsing, cookie poisoning and invalid input. in which of the following attacks does the attacker gains access to a restricted page within a web application by supplying a url directly
a) sql injectionb) cross-site request forgery (csrf)c) forceful browsingd) cross-site scripting (xss)