Palo Alto Networks (PANW) Certified Network Security Administrator (PCNSA) Practice Exam

Which mode allows better scalability while setting up High Availability in a network?

1. Active-Passive mode

2. Active-Active mode

3. Redundant mode

4. Failover mode

The correct answer is: Active-Active mode

Active-Active mode is designed for high availability setups that require improved scalability. In this configuration, both units actively process traffic simultaneously, sharing the load rather than one unit being entirely passive. This not only ensures continued availability in case one unit fails but also enhances overall performance by distributing workload across both units. With Active-Active mode, organizations can better utilize their resources under regular operation circumstances. When traffic demand increases, both units can contribute equally, allowing for dynamic load balancing, which can lead to more efficient resource use and improved network performance. This capability supports scenarios where high traffic volumes are expected, providing a scalable solution as network demands grow. In contrast, Active-Passive mode, while providing failover capabilities, does not allow for load sharing. Only one unit manages the traffic, limiting scalability since the passive unit remains idle until it is needed in case of a failure. Other modes like Redundant and Failover refer more to backup mechanisms and do not specifically address scalability in the same way that Active-Active mode does.