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A healthcare organization stores patient records in SharePoint Online. They need to ensure that the data is encrypted at rest and in transit. Which statement is true regarding Microsoft 365 encryption?

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A healthcare organization stores patient records in SharePoint Online. They need to ensure that the data is encrypted at rest and in transit. Which statement is true regarding Microsoft 365 encryption?

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

Best answer

Microsoft provides default encryption for data at rest and in transit.

Microsoft 365 encrypts all data at rest using disk and file encryption, and all data in transit using industry-standard protocols like TLS.

B

Distractor review

Customers must enable encryption at rest manually for each workload.

Encryption at rest is automatically applied to all Microsoft 365 data; customers do not need to enable it.

C

Distractor review

Encryption only applies to Exchange Online, not SharePoint or OneDrive.

Encryption at rest and in transit applies to all Microsoft 365 services including Exchange, SharePoint, OneDrive, and Teams.

D

Distractor review

Encryption is optional and can be turned off if a customer chooses.

Microsoft does not allow disabling encryption for data in transit or at rest; it is a fundamental security measure.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Related practice questions

Related MS-900 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 MS-900 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Microsoft provides default encryption for data at rest and in transit. — Microsoft 365 uses service-side encryption to protect data at rest (using BitLocker for disks and per-file encryption) and encrypts data in transit using TLS/SSL. These protections are enabled by default for all customers without any additional configuration. Customers cannot opt out of encryption in transit, and encryption at rest is also applied automatically. Some services allow customer-managed keys for added control, but the baseline encryption is always enabled.

What should I do if I get this MS-900 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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