Question 210

A network health event should trigger a remediation Lambda function when CloudWatch changes an alarm state. Which event orchestration service fits?

  1. Create an Amazon EventBridge rule for the alarm-state event invoking Lambda
  2. Make remediation idempotent by checking current network state before applying changes
  3. Give its execution role only the necessary TGW API permissions and resource scope
  4. Record configuration histories with AWS Config

Explanation

Correct Answer

A:

EventBridge can route matching service events to automation targets so response is driven by actual state transitions.

Incorrect Answers

B:

Idempotent operations converge on the intended configuration, preventing duplicated routes or repeated deletions during retries; this belongs to safe repeated execution of infrastructure automation, while the problem is event-driven network incident response.

C:

Automation uses the function's IAM role, so bounded control-plane authority reduces impact if code or input is compromised; this changes least-privilege permissions for network remediation code, not the necessary event-driven network incident response.

D:

In the resource-configuration history for network governance workflow, config tracks supported resource configuration states and history, complementing the desired-state templates used for provisioning; the current case needs event-driven network incident response.

Question 211

An organization must automatically prevent new VPCs from using a disallowed IPv4 range. Which preallocation control is suited to address governance?

  1. Evaluate configuration with AWS Config rules and route findings into an event-driven ticket workflow
  2. Use Amazon VPC IP Address Manager pools with allocation rules and organizational visibility
  3. Allocate CIDRs from Amazon VPC IPAM pools during provisioning
  4. Use the AWS SDK or AWS CLI with scoped IAM credentials

Explanation

Correct Answer

B:

IPAM centrally tracks address allocations and can govern CIDR distribution to reduce overlapping or noncompliant network assignments.

Incorrect Answers

A:

Compliance evaluation surfaces nonconforming security-group settings, and events connect the findings to organization-standard handling; that addresses continuous network policy evaluation and response, rather than consistent centrally governed CIDR allocation.

C:

IPAM pools track and distribute address space, allowing deployment automation to request coherent ranges rather than hardcoding overlapping networks; this changes automated conflict-resistant IP space assignment, not the necessary consistent centrally governed CIDR allocation.

D:

In the authenticated automation of VPC route management workflow, CLI and SDK tools call AWS network control-plane APIs, enabling repeatable actions without interactive console workflows; the current case needs consistent centrally governed CIDR allocation.

Question 212

A deployed VPC flow-log resource should automatically be re-created if a developer deletes it outside IaC. What is an appropriate operational pattern?

  1. Implement a CloudFormation custom resource backed by controlled service logic
  2. Run CloudFormation drift detection on supported stack resources
  3. Detect configuration drift and invoke approved automated remediation through managed orchestration
  4. Record configuration histories with AWS Config

Explanation

Correct Answer

C:

Detection alone reports divergence; a remediation workflow must execute the sanctioned resource repair under controlled permissions.

Incorrect Answers

A:

Custom resources let stack create, update, and delete operations invoke application code to manage external configuration; that addresses IaC lifecycle support for otherwise unsupported networking APIs, rather than correction of missing networking telemetry resources.

B:

Drift detection compares current resource state with template-declared properties to expose untracked manual changes; this belongs to detection of manual divergence from IaC declarations, while the problem is correction of missing networking telemetry resources.

D:

In the resource-configuration history for network governance workflow, config tracks supported resource configuration states and history, complementing the desired-state templates used for provisioning; the current case needs correction of missing networking telemetry resources.

Question 213

Network resources change across hundreds of stacks and compliance staff require a historical inventory of security-group changes. Which service complements IaC?

  1. Evaluate configuration with AWS Config rules and route findings into an event-driven ticket workflow
  2. Create an Amazon EventBridge rule for the alarm-state event invoking Lambda
  3. Execute changes through a traceable IAM role and capture CloudTrail API audit history
  4. Record configuration histories with AWS Config

Explanation

Correct Answer

D:

Config tracks supported resource configuration states and history, complementing the desired-state templates used for provisioning.

Incorrect Answers

A:

Compliance evaluation surfaces nonconforming security-group settings, and events connect the findings to organization-standard handling; that addresses continuous network policy evaluation and response, rather than resource-configuration history for network governance.

B:

EventBridge can route matching service events to automation targets so response is driven by actual state transitions; this belongs to event-driven network incident response, while the problem is resource-configuration history for network governance.

C:

CloudTrail records API actions and identities, giving reviewers evidence of when authorized automation changed network configuration; this changes auditable ownership and timing of automated network edits, not the necessary resource-configuration history for network governance.

Question 214

A team uses a CloudFormation template that provisions an elastic IP to every subnet even where unnecessary. What design change improves cost efficiency?

  1. Record configuration histories with AWS Config
  2. Pass environment-specific IDs as parameters or use supported cross-stack references
  3. Parameterize egress requirements and create optional NAT or address resources only where needed
  4. Run CloudFormation drift detection on supported stack resources

Explanation

Correct Answer

C:

Conditional resource creation prevents costly network components from being provisioned in environments without a matching traffic need.

Incorrect Answers

A:

Config tracks supported resource configuration states and history, complementing the desired-state templates used for provisioning; that addresses resource-configuration history for network governance, rather than cost-aware conditional creation of network egress components.

B:

Parameterization removes deployment-specific identifiers from the reusable template and makes substitutions explicit; this belongs to deployable IaC across account-specific resource IDs, while the problem is cost-aware conditional creation of network egress components.

D:

In the detection of manual divergence from IaC declarations workflow, drift detection compares current resource state with template-declared properties to expose untracked manual changes; the current case needs cost-aware conditional creation of network egress components.

Question 215

An automated deployment needs to pass a generated subnet ID from a networking stack into an application stack. Which CloudFormation technique reduces copied identifiers?

  1. Review stack events and the rollback state before retrying controlled changes
  2. Export the subnet output and import it with supported cross-stack references
  3. Parameterize egress requirements and create optional NAT or address resources only where needed
  4. Implement a CloudFormation custom resource backed by controlled service logic
  5. Run CloudFormation drift detection on supported stack resources

Explanation

Correct Answer

B:

Cross-stack references connect stack outputs to dependent resources and reduce manual handling of dynamically assigned IDs.

Incorrect Answers

A:

CloudFormation records failing operations and attempts rollback based on configuration; blind repeats can compound partial dependencies; that addresses diagnosis of infrastructure deployment and rollback failures, rather than dependency-safe exchange of IaC network resource identifiers.

C:

Conditional resource creation prevents costly network components from being provisioned in environments without a matching traffic need; this changes cost-aware conditional creation of network egress components, not the necessary dependency-safe exchange of IaC network resource identifiers.

D:

In the IaC lifecycle support for otherwise unsupported networking APIs workflow, custom resources let stack create, update, and delete operations invoke application code to manage external configuration; the current case needs dependency-safe exchange of IaC network resource identifiers.

E:

This produces detection of manual divergence from IaC declarations: Drift detection compares current resource state with template-declared properties to expose untracked manual changes; the stem instead tests dependency-safe exchange of IaC network resource identifiers.

Question 216

A Lambda automation function should modify transit gateway route tables but not create IAM users. What authorization principle applies?

  1. Create an Amazon EventBridge rule for the alarm-state event invoking Lambda
  2. Give its execution role only the necessary TGW API permissions and resource scope
  3. Manage route tables in versioned infrastructure-as-code templates with reviewable change sets
  4. Make remediation idempotent by checking current network state before applying changes

Explanation

Correct Answer

B:

Automation uses the function's IAM role, so bounded control-plane authority reduces impact if code or input is compromised.

Incorrect Answers

A:

EventBridge can route matching service events to automation targets so response is driven by actual state transitions; that addresses event-driven network incident response, rather than least-privilege permissions for network remediation code.

C:

Versioned IaC records intended routing state and allows peer review and controlled updates before resources change; this changes auditable declarative network configuration, not the necessary least-privilege permissions for network remediation code.

D:

In the safe repeated execution of infrastructure automation workflow, idempotent operations converge on the intended configuration, preventing duplicated routes or repeated deletions during retries; the current case needs least-privilege permissions for network remediation code.

Question 217

A network pipeline should not run remediation twice for the same repeated event. Which automation property should be built in?

  1. Evaluate configuration with AWS Config rules and route findings into an event-driven ticket workflow
  2. Create an Amazon EventBridge rule for the alarm-state event invoking Lambda
  3. Give its execution role only the necessary TGW API permissions and resource scope
  4. Make remediation idempotent by checking current network state before applying changes

Explanation

Correct Answer

D:

Idempotent operations converge on the intended configuration, preventing duplicated routes or repeated deletions during retries.

Incorrect Answers

A:

Compliance evaluation surfaces nonconforming security-group settings, and events connect the findings to organization-standard handling; that addresses continuous network policy evaluation and response, rather than safe repeated execution of infrastructure automation.

B:

EventBridge can route matching service events to automation targets so response is driven by actual state transitions; this belongs to event-driven network incident response, while the problem is safe repeated execution of infrastructure automation.

C:

Automation uses the function's IAM role, so bounded control-plane authority reduces impact if code or input is compromised; this changes least-privilege permissions for network remediation code, not the necessary safe repeated execution of infrastructure automation.

Question 218

An organization wants to detect permissive security groups and automatically start a ticket workflow across accounts. Which combination is relevant?

  1. Create an Amazon EventBridge rule for the alarm-state event invoking Lambda
  2. Record configuration histories with AWS Config
  3. Evaluate configuration with AWS Config rules and route findings into an event-driven ticket workflow
  4. Use AWS CloudFormation StackSets with organization-aware deployment targets

Explanation

Correct Answer

C:

Compliance evaluation surfaces nonconforming security-group settings, and events connect the findings to organization-standard handling.

Incorrect Answers

A:

EventBridge can route matching service events to automation targets so response is driven by actual state transitions; that addresses event-driven network incident response, rather than continuous network policy evaluation and response.

B:

Config tracks supported resource configuration states and history, complementing the desired-state templates used for provisioning; this belongs to resource-configuration history for network governance, while the problem is continuous network policy evaluation and response.

D:

In the multi-account IaC rollout from a centralized definition workflow, stackSets replicate stacks to selected accounts and Regions from central administration while tracking their deployment states; the current case needs continuous network policy evaluation and response.

Question 219

A CloudFormation deployment of network resources fails partway through, leaving the service unavailable. What should operators understand about the stack process?

  1. Version route-table IaC and deploy changes through staged pipelines with rollback points
  2. Review stack events and the rollback state before retrying controlled changes
  3. Export the subnet output and import it with supported cross-stack references
  4. Implement a CloudFormation custom resource backed by controlled service logic

Explanation

Correct Answer

B:

CloudFormation records failing operations and attempts rollback based on configuration; blind repeats can compound partial dependencies.

Incorrect Answers

A:

Versioned deployment records make network policy changes reviewable and allow restoration of a previously tested desired state; that addresses controlled promotion and rollback of network routing changes, rather than diagnosis of infrastructure deployment and rollback failures.

C:

Cross-stack references connect stack outputs to dependent resources and reduce manual handling of dynamically assigned IDs; this changes dependency-safe exchange of IaC network resource identifiers, not the necessary diagnosis of infrastructure deployment and rollback failures.

D:

In the IaC lifecycle support for otherwise unsupported networking APIs workflow, custom resources let stack create, update, and delete operations invoke application code to manage external configuration; the current case needs diagnosis of infrastructure deployment and rollback failures.

Question 220

A platform team must gradually switch between TGW route configurations while preserving a documented rollback plan. Which practice best supports this?

  1. Review stack events and the rollback state before retrying controlled changes
  2. Manage route tables in versioned infrastructure-as-code templates with reviewable change sets
  3. Use AWS CloudFormation StackSets with organization-aware deployment targets
  4. Version route-table IaC and deploy changes through staged pipelines with rollback points

Explanation

Correct Answer

D:

Versioned deployment records make network policy changes reviewable and allow restoration of a previously tested desired state.

Incorrect Answers

A:

CloudFormation records failing operations and attempts rollback based on configuration; blind repeats can compound partial dependencies; that addresses diagnosis of infrastructure deployment and rollback failures, rather than controlled promotion and rollback of network routing changes.

B:

Versioned IaC records intended routing state and allows peer review and controlled updates before resources change; this belongs to auditable declarative network configuration, while the problem is controlled promotion and rollback of network routing changes.

C:

StackSets replicate stacks to selected accounts and Regions from central administration while tracking their deployment states; this changes multi-account IaC rollout from a centralized definition, not the necessary controlled promotion and rollback of network routing changes.

AWS Certified Advanced Networking - Specialty ANS-C01 Practice Tests