Which of the following security levels are applied on the network to prevent unauthorized access?
Each correct answer represents a complete solution. Choose all that apply.

A.
Access control lists

B.
Authentication

C.
Authorization

D.
MAC filtering

Explanation:
Authorization and authentication are the security levels that are applied on the network to prevent unauthorized access. Authentication and authorization verifies username and password in order to determine whether the user is authorized or not.Answer options A and D are incorrect. Access control lists and MAC filtering are the security features that are used to prevent network attacks. Fact What is authorization? Hide Authorization is a process that verifies whether a user has permission to access a Web resource. A Web server can restrict access to some of its resources to only those clients that log in using a recognized username and password. To be authorized, a user must first be authenticated. FactWhat is authentication? Hide Authentication is the act of establishing or confirming something (or someone) as authentic, that is, that claims made by or about the subject are true ("authentification" is a variant of this word). This might involve confirming the identity of a person, tracing the origins of an artifact, ensuring that a product is what its packaging and labeling claims to be, or assuring that a computer program is a trusted one. Authentication is a process of verifying the user. The accuracy of the authentication can be determined by the number of factors used for the authentication, such as the following:
One-factor authentication Two-factor authentication Three-factor authentication Multi-factor authentication