Palo Alto Networks (PANW) System Engineer (PSE) Practice Exam

In Kubernetes CNF mode, which protocol is supported on Native/OnPrem environments, but not on public clouds?

1. BGP

2. BFD

3. Tunnel interface

4. OSPF

The correct answer is: OSPF

In Kubernetes CNF (Container Networking Function) mode, OSPF (Open Shortest Path First) is a routing protocol that is traditionally supported in Native or On-Premises environments. This protocol is commonly used for internal routing within a single autonomous system and operates at Layer 3. The reason OSPF is not typically supported on public clouds has to do with the nature of cloud environments, which often manage their network topologies differently and abstract certain networking functionalities that are more commonly found in on-premises setups. In public clouds, networking usually relies on managed services and routing features provided by the cloud providers, rather than allowing direct control and management via protocols like OSPF. Conversely, the other protocols mentioned, such as BGP (Border Gateway Protocol) and BFD (Bidirectional Forwarding Detection), may be supported in public cloud environments. This is primarily because they can facilitate dynamic routing and protocol detection that align better with the highly scalable and distributed nature of cloud architectures. Tunnel interfaces are part of network configurations that can also be adapted for various environments, including clouds. Therefore, OSPF stands out as the protocol that is predominantly utilized in native or on-premises scenarios without having equivalent support in public cloud settings.