site_logo

Previous Next


  1. Network+ Practice Tests
  2. Network+ Lab Simulator
  3. Network+ LabSim w/ ExamSim
  4. Network+ Cram Notes

4.0 Network+ Certification Cram Notes : Network Security

4.1 Explain the following common security concepts.

Explain Defense in depth with respect to the following

Defense in depth is a security approach that involves implementing multiple layers of security controls to defend against potential threats. Each layer provides an additional line of defense and makes it more difficult for an attacker to compromise the network.

1. Network segmentation: This involves dividing a network into smaller segments or subnets, each of which has its own security policies and protocols. This helps to limit the spread of malware or other security threats and makes it easier to isolate and contain any problems.

2. Screened subnet: A screened subnet, also known as a demilitarized zone (DMZ), is a network segment that sits between the public internet and a private internal network. This layer of security provides a buffer between the public internet and the internal network, making it more difficult for attackers to reach sensitive information.

3. Separation of duties: This involves assigning different security responsibilities to different individuals or teams within an organization. This helps to ensure that no single person has too much control over the network and helps to reduce the risk of insider threats.

4. Network access control: This involves setting up rules and policies for how and when users can access network resources. This can include limiting access to specific hours, requiring multi-factor authentication, or implementing firewalls to control incoming and outgoing traffic.

5. Honeypot: A honeypot is a security resource that is set up to attract attackers and then monitor their behavior. This can help organizations to better understand the tactics and techniques used by attackers and to improve their security measures.

Authentication methods and typical usage

Authentication is the process of verifying the identity of a user, device, or system trying to access a network or computer system. The following are some commonly used authentication methods:

1. Multifactor: This method uses two or more authentication factors to verify the identity of the user. For example, a user may be required to provide a password and a biometric sample, such as a fingerprint or facial recognition.

2. Terminal Access Controller Access-Control System Plus (TACACS+): TACACS+ is an authentication protocol that provides centralized authentication, authorization, and accounting for remote access to a network. It allows the administrator to control and manage user access to the network.

3. Single sign-on (SSO): SSO allows a user to log in once and access multiple applications or systems without having to log in again. This simplifies the login process for users and reduces the number of passwords they need to remember.

4. Remote Authentication Dial-in User Service (RADIUS): RADIUS is a client/server protocol used for remote authentication and authorization. It is typically used for remote access to a network through a dial-up or VPN connection.

5. LDAP: Lightweight Directory Access Protocol (LDAP) is an application protocol used for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network. It is used for authentication and authorization purposes.

6. Kerberos: Kerberos is an authentication protocol used to securely verify the identity of a user or device on a network. It is based on secret-key cryptography and is used to prevent eavesdropping and replay attacks.

7. Local authentication: This method involves verifying the identity of a user, device, or system against a local database, such as a local user account database on a computer system.

8. 802.1X: 802.1X is an IEEE standard for port-based network access control. It provides an authentication mechanism for network access, ensuring that only authorized devices can connect to the network.

9. Extensible Authentication Protocol (EAP): EAP is a flexible authentication protocol used in wireless networks and point-to-point connections. It allows the use of multiple authentication methods and is often used in conjunction with RADIUS or TACACS+.

Note: Multifactor authentication typically involves using two or more independent factors for authentication. These factors can be something a user knows (such as a password or PIN), something a user has (such as a security token or smart card), or something a user is (such as a fingerprint or other biometric data). Using a combination of two or more of these factors helps to increase security, as it is much more difficult for an attacker to obtain and use multiple authentication factors at the same time.


Previous Next



simulationexams.com ad

certexams.com ad