Layer 7 devices used to prevent specific types of html tags are called:
A. Firewalls B. Content filters C. Routers D. NIDS
Explanation: A content filter is a is a type of software designed to restrict or control the content a reader is authorised to access, particularly when used to limit material delivered over the Internet via the Web, e-mail, or other means. Because the user and the OSI layer interact directly with the content filter, it operates at Layer 7 of the OSI model.