Quick Answer
AWS Systems Manager is the correct choice for centralized EC2 management across multiple AWS accounts because it provides a unified control plane via the Systems Manager Agent, enabling you to run commands, manage patches, and automate operations on instances in any account without requiring SSH or bastion hosts. This works by configuring cross-account IAM roles and sharing Systems Manager resources through AWS Resource Access Manager, allowing a central management account to securely target instances across the organization. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of operational governance at scale, often appearing as a distractor against solutions like AWS Config or AWS OpsWorks; a common trap is assuming you need a VPN or VPC peering for command execution, but Systems Manager operates over the AWS control plane. Remember the mnemonic “SSM = Single Source of Management” to recall that it centralizes EC2 administration without network-level dependencies.
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company wants to centralize management of Amazon EC2 instances across multiple AWS accounts. They need to be able to run commands on instances in any account from a central management account. Which service should be used?
AWS Systems Manager
Systems Manager Run Command and Session Manager can target instances across accounts.
AWS Config
Why wrong: Config is for resource inventory and compliance.
Amazon ECS
Why wrong: ECS is for container orchestration.
AWS OpsWorks
Why wrong: OpsWorks is for configuration management, not command execution across accounts.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Systems Manager
AWS Systems Manager (SSM) is the correct choice because it provides a unified interface to manage EC2 instances across multiple AWS accounts via the Systems Manager Agent (SSM Agent). With SSM, you can use Run Command, Session Manager, or State Manager to execute commands on instances in any account, as long as the instances are registered in AWS Systems Manager and the appropriate cross-account IAM roles and resource access manager (RAM) sharing are configured. This centralizes management without requiring SSH or bastion hosts.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Systems Manager
Why this is correct
Systems Manager Run Command and Session Manager can target instances across accounts.
Related concept
Read the scenario before looking for a memorised answer.
AWS Config
Why it's wrong here
Config is for resource inventory and compliance.
Amazon ECS
Why it's wrong here
ECS is for container orchestration.
AWS OpsWorks
Why it's wrong here
OpsWorks is for configuration management, not command execution across accounts.
Common exam traps
The trap here is that candidates may confuse AWS Config's compliance and auditing capabilities with Systems Manager's operational command execution, or mistakenly think OpsWorks (which also uses agents) is suitable for cross-account command execution, but OpsWorks lacks native cross-account centralized command features and is more focused on application lifecycle management.
Trap categories for this question
Command / output trap
OpsWorks is for configuration management, not command execution across accounts.
Detailed technical explanation
Under the hood, AWS Systems Manager uses the SSM Agent installed on EC2 instances to communicate with the Systems Manager service via HTTPS (port 443) and AWS Identity and Access Management (IAM) roles. For cross-account management, you must share the Systems Manager automation documents or use AWS Resource Access Manager (RAM) to share managed instances, and configure IAM roles in the target accounts to allow the central management account to assume a role (e.g., via AWS Security Token Service) with permissions to invoke SSM APIs like SendCommand. A real-world scenario is a DevOps team using SSM Run Command to patch thousands of instances across production, staging, and development accounts from a single pane of glass.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Systems Manager — AWS Systems Manager (SSM) is the correct choice because it provides a unified interface to manage EC2 instances across multiple AWS accounts via the Systems Manager Agent (SSM Agent). With SSM, you can use Run Command, Session Manager, or State Manager to execute commands on instances in any account, as long as the instances are registered in AWS Systems Manager and the appropriate cross-account IAM roles and resource access manager (RAM) sharing are configured. This centralizes management without requiring SSH or bastion hosts.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company wants to centralize management of Amazon EC2 instances across multiple accounts using AWS Systems Manager. The company uses AWS Organizations. What is the simplest way to enable Systems Manager to manage instances in all accounts?
easyWhy C: Option C is correct because Systems Manager Explorer provides a centralized view of operational data across accounts. Option A is wrong because Systems Manager Automation runbooks are for automation, not centralized management. Option B is wrong because AWS Config is for compliance, not management. Option D is wrong because CloudFormation is for infrastructure deployment.
Variation 2. A company wants to use AWS Systems Manager to automate patching of EC2 instances across multiple AWS accounts. What is the most efficient way to manage this centrally?
easyWhy B: Option B is correct because Systems Manager Quick Setup can configure automation across accounts from a central management account. Option A is wrong because Systems Manager Automation alone does not handle multi-account. Option C is wrong because Systems Manager Patch Manager is a component, not a multi-account solution. Option D is wrong because AWS Config is for compliance, not patching.
Last reviewed: Jun 24, 2026
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.
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