CompTIA Security+ Question A-92

Users report that they are unable to access network printing services. The security technician checks the router access list and sees that web, email, and secure shell are allowed. Which of the following is blocking network printing?

A. Port security
B. Flood guards
C. Loop protection
D. Implicit deny

Answer: D

Implicit deny says that if you aren’t explicitly granted access or privileges for a resource, you’re denied access by default. The scenario does not state that network printing is allowed in the router access list, therefore, it must be denied by default.