The loss prevention department has purchased a new application that allows the employees to
monitor the alarm systems at remote locations. However, the application fails to connect to the
vendor’s server and the users are unable to log in. Which of the following are the MOST likely
causes of this issue? (Select TWO).

A.
URL filtering

B.
Role-based access controls

C.
MAC filtering

D.
Port Security

E.
Firewall rules

Explanation:
A URL filter is used to block URLs (websites) to prevent users accessing the website.
Firewall rules act like ACLs, and they are used to dictate what traffic can pass between the firewall
and the internal network. Three possible actions can be taken based on the rule’s criteria:
Block the connection
Allow the connection
Allow the connection only if it is secured
Incorrect Options:
B: Role-based Access Control is basically based on a user’s job description. When a user is
assigned a specific role in an environment, that user’s access to objects is granted based on the
required tasks of that role. Since the sales team needs to save and print reports, they would not be
restricted if restrictions were role-based.
C: A MAC filter is a list of authorized wireless client interface MAC addresses that is used by a
WAP to block access to all unauthorized devices.
D: Port security works at level 2 of the OSI model and allows an administrator to configure switch
ports so that only certain MAC addresses can use the port.

Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 19,
61, 276
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex,

Indianapolis, 2014, p. 157