CompTIA Security+ Question H-94

Layer 7 devices used to prevent specific types of html tags are called:

A. Firewalls
B. Content filters
C. Routers
D. NIDS

Answer: B

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.