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ANS-C01 · Question #180

A network engineer needs to deploy an AWS Network Firewall firewall into an existing AWS environment. The environment consists of the following: - A transit gateway with all VPCs attached to it…

The correct answer is B. Deploy Network Firewall in all Availability Zones in a centralized inspection VPC. C. Update the HOME_NET rule group variable to include all CIDR ranges of the VPCs and on- F. Configure two transit gateway route tables. Associate all application VPCs with one transit. https://aws.amazon.com/blogs/networking-and-content-delivery/centralized-inspection- architecture-with-aws-gateway-load-balancer-and-aws-transit-gateway/

Submitted by emma.c· Mar 6, 2026

Question

A network engineer needs to deploy an AWS Network Firewall firewall into an existing AWS environment. The environment consists of the following:

  • A transit gateway with all VPCs attached to it
  • Several hundred application VPCs
  • A centralized egress internet VPC with a NAT gateway and an internet

gateway

  • A centralized ingress internet VPC that hosts public Application Load

Balancers

  • On-premises connectivity through an AWS Direct Connect gateway

attachment The application VPCs have workloads deployed across multiple Availability Zones in private subnets with the VPC route table s default route (0.0.0.0/0) pointing to the transit gateway. The Network Firewall firewall needs to inspect east-west (VPC-to-VPC) traffic and north-south (internet-bound and on-premises network) traffic by using Suricata compatible rules. The network engineer must deploy the firewall by using a solution that requires the least possible architectural changes to the existing production environment. Which combination of steps should the network engineer take to meet these requirements? (Choose three.)

Options

  • ADeploy Network Firewall in all Availability Zones in each application VPC.
  • BDeploy Network Firewall in all Availability Zones in a centralized inspection VPC.
  • CUpdate the HOME_NET rule group variable to include all CIDR ranges of the VPCs and on-
  • DUpdate the EXTERNAL_NET rule group variable to include all CIDR ranges of the VPCs and on-
  • EConfigure a single transit gateway route table. Associate all application VPCs and the centralized
  • FConfigure two transit gateway route tables. Associate all application VPCs with one transit

How the community answered

(17 responses)
  • A
    12% (2)
  • B
    59% (10)
  • D
    6% (1)
  • E
    24% (4)

Explanation

https://aws.amazon.com/blogs/networking-and-content-delivery/centralized-inspection- architecture-with-aws-gateway-load-balancer-and-aws-transit-gateway/

Topics

#AWS Network Firewall deployment#AWS Transit Gateway routing#Traffic Inspection Architecture#Suricata rule configuration

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