Palo Alto Networks provides various reference architectures for deploying VM-Series firewalls in different cloud environments. Let's examine the options:
A: Cloud NGFW for AWS: Combined Model: While Cloud NGFW is an offering, the term "Combined Model" isn't a standard, documented reference architecture name. Cloud NGFW for AWS focuses on simplified deployment and management but doesn't use this specific terminology for its deployment models.
B: AWS VM-Series: Isolated Transit Gateway: This is a VALID deployment model. It involves deploying VM-Series firewalls in an isolated VPC connected to AWS Transit Gateway. This provides centralized security inspection for traffic flowing between different VPCs and on-premises networks connected to the Transit Gateway.
Reference:
C: Cloud NGFW for Azure: Virtual WAN integration: This is a VALID deployment model. Cloud NGFW for Azure integrates with Azure Virtual WAN to provide centralized security for branch offices, virtual networks, and on-premises locations connected to the Virtual WAN hub.
D: GCP VM-Series: VPC network peering model with Shared VPC: This is a VALID deployment model. It uses VPC network peering to connect different VPC networks and employs Shared VPC to centralize network management and security. VM-Series firewalls are deployed to inspect traffic between the peered VPCs, providing consistent security enforcement.
E: Azure VM-Series: Distributed VCN - common firewall: While VM-Series can be deployed in a distributed manner across VCNs (Virtual Cloud Networks, now referred to as Virtual Networks), the term "common firewall" isn't a standard term used to describe a specific architecture. Distributed deployments imply having firewalls in each VCN or application segment, not a single "common" firewall.