mediummultiple choiceObjective-mapped

A company hosts a financial reporting platform on EC2. Administrators must connect without opening SSH or RDP ports to the internet. What should the architect use?

Question 1mediummultiple choice
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A company hosts a financial reporting platform on EC2. Administrators must connect without opening SSH or RDP ports to the internet. What should the architect use?

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Distractor review

A public Elastic IP address on each instance

Public IPs do not provide secure administrative access by themselves.

B

Distractor review

A bastion host with SSH open to 0.0.0.0/0

Opening SSH broadly increases attack surface.

C

Best answer

AWS Systems Manager Session Manager with the required instance role

Session Manager provides audited shell access without inbound SSH/RDP exposure.

D

Distractor review

An internet gateway attached to the private subnet

Internet gateways do not make private administration secure.

Common exam trap

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Technical deep dive

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

  • CIDR notation defines the prefix length.
  • Block size helps identify subnet boundaries.
  • Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
  • The required host count determines the smallest suitable subnet.

TExam Day Tips

  • Write the block size before choosing the subnet.
  • Check whether the question asks for hosts, subnets or a specific address range.
  • Do not confuse /24, /25, /26 and /27 host counts.

Related practice questions

Related SAA-C03 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

FAQ

Questions learners often ask

What does this SAA-C03 question test?

CIDR notation defines the prefix length.

What is the correct answer to this question?

The correct answer is: AWS Systems Manager Session Manager with the required instance role — Session Manager removes the need for inbound administrative ports and supports logging and IAM-based access control.

What should I do if I get this SAA-C03 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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