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.