Palo Alto Networks Certified Network Security Engineer (PCNSE)Deploy and ConfigureEasy
A network administrator is configuring a new Palo Alto Networks firewall. The firewall needs to be able to route traffic between multiple VLANs and connect to the internet. Which interface type should be configured on the firewall to allow it to participate in routing protocols and forward traffic between different subnets?
- AVirtual Wire interface
- BTap interface
- CLayer 3 interface
- DLayer 2 interface
Show answer & explanationAnswer & explanation
Correct answer: C. Layer 3 interface
A Layer 3 interface is essential for routing traffic between different subnets and participating in routing protocols, enabling the firewall to act as a router.
Why the other options are wrong
- A. Virtual Wire interfaces are deployed transparently in a network segment and do not have IP addresses for routing.
- B. Tap interfaces are used for passive monitoring and do not forward traffic or participate in routing.
- D. Layer 2 interfaces operate at the data link layer and are primarily used for switching within a single broadcast domain.
Layer 3 Interface
A network interface configured with an IP address, enabling it to participate in routing and forward traffic between different subnets.
- Has an IP address and subnet mask.
- Can be assigned to a security zone.
- Participates in routing protocols.
- Essential for inter-VLAN routing and connecting to the internet.
Memory trick: Route like a King, with Layer 3's ring!