Palto Alto PCNSE Practice Exam Questions

Explanation: Custom Panorama Admin: Custom Panorama Admin roles allow you to customize the elements of Panorama that an administrator can access. You can hide tabs in the web interface, you can set specific items in Panorama to read-only, or you can limit an administrator’s access to Panorama plugins. Custom Panorama Admin roles require planning and configuration, but they provide extensive flexibility because you can control what administrators can access through the web interface or the CLI. Device Group and Template Admin: Device Group and Template Admin roles also require configuration because there are no built-in examples. These Admin Roles allow you to define which Panorama templates or Panorama device groups an administrator can access and configure. You can hide tabs in the web interface or set specific items to read only to control what administrators can configure.

Explanation: For a network security administrator to authenticate and identify a user with a new BYOD-type device that is not joined to the corporate domain, the most effective method is to use an Authentication policy targeting users not yet identified by the system.
A. an Authentication policy with 'unknown' selected in the Source User field:
An Authentication policy allows the firewall to challenge unidentified users for credentials. By selecting 'unknown' in the Source User field, the policy targets users who have not yet been identified by the firewall, which would include users on new BYOD devices not joined to the domain.
Once the user provides valid credentials, the firewall can authenticate the user and map their identity to subsequent sessions, enabling the application of user-based policy rules and monitoring.
This approach ensures that new and unknown devices can be properly authenticated and identified without compromising security or requiring the device to be part of the corporate domain.

Explanation: Decryption can be resource-intensive, and in scenarios where the firewall is nearing its resource limits, optimizing decryption practices is crucial. One way to do this is by choosing more efficient encryption algorithms that require less computational power.
C. Use ECDSA instead of RSA for traffic that isn't sensitive or high-priority:
Elliptic Curve Digital Signature Algorithm (ECDSA) is known for requiring smaller key sizes compared to RSA for a comparable level of security. This translates to less computational overhead during the encryption and decryption processes.
By using ECDSA for traffic that isn't sensitive or high-priority, the administrator can reduce the processing load associated with decryption on the firewall. This is particularly beneficial in scenarios where resource optimization is necessary.
It's important to note that this approach does not compromise the security of encrypted traffic. Instead, it offers a more resource-efficient way to manage decryption, thus helping to maintain firewall performance even when system resources are under significant demand.
By judiciously applying this strategy, administrators can manage the decryption workload on the firewall, ensuring continued protection and inspection of encrypted traffic without overburdening the firewall's resources.

Explanation: The correct packet-flow sequence is C. PBF > Static route > Security policy enforcement. This sequence describes the order of operations that the firewall performs when processing a packet. PBF stands for Policy-Based Forwarding, which is a feature that allows the firewall to override the routing table and forward traffic based on the source and destination addresses, application, user, or service. PBF is evaluated before the static route lookup, which is the default method of forwarding traffic based on the destination address and the longest prefix match. Security policy enforcement is the stage where the firewall applies the security policy rules to allow or block traffic based on various criteria, such as zone, address, port, user, application, etc.