The answer is EmailEvents and DeviceNetworkEvents. This is correct because EmailEvents captures the user’s click on a URL within a phishing email, while DeviceNetworkEvents logs the subsequent network connection from the corporate device to that same malicious site. Joining these two tables on the URL value allows the KQL query to correlate the phishing URL click detection with the device’s actual network activity, creating a complete attack chain for the detection rule. On the MS-102 exam, this scenario tests your ability to select the right advanced hunting tables for cross-domain correlation, a common trap being to confuse EmailUrlInfo (which stores URL metadata) with EmailEvents (which records the click action). Remember the memory tip: “Click in EmailEvents, connect in DeviceNetworkEvents” — the click event table and the network event table are the two halves of the phishing-to-connection chain.
MS-102 Practice Question: Manage security and threats by using Microsoft Defender XDR
This MS-102 practice question tests your understanding of manage security and threats by using microsoft defender xdr. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 security analyst is building a custom detection rule in Microsoft 365 Defender to identify when a user clicks a malicious URL in a phishing email and subsequently visits the malicious site from their corporate device. The analyst plans to use advanced hunting with Kusto Query Language (KQL). Which two tables must be joined to capture both the URL click event and the network connection to the malicious site?
EmailEvents contains email delivery info but not URL click events; DeviceNetworkEvents is correct but EmailEvents does not provide click data.
B
EmailUrlInfo and DeviceNetworkEvents
EmailUrlInfo records when a user clicks a URL in an email. DeviceNetworkEvents logs network connections. Joining on the URL's domain or hash allows linking click to subsequent connection.
C
EmailAttachmentInfo and DeviceProcessEvents
Why wrong: EmailAttachmentInfo is for attachments, not URLs. DeviceProcessEvents logs process creation, not network connections.
D
EmailEvents and DeviceFileEvents
Why wrong: EmailEvents lacks URL click details, and DeviceFileEvents logs file operations, not network connections.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EmailEvents and DeviceNetworkEvents
Option B is correct because EmailUrlInfo contains the URL click events from phishing emails, and DeviceNetworkEvents logs network connections from corporate devices. Joining these two tables on the URL value captures the full chain: the user clicking the malicious link and the device subsequently connecting to that site.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
EmailEvents and DeviceNetworkEvents
Why this is correct
EmailEvents contains email delivery info but not URL click events; DeviceNetworkEvents is correct but EmailEvents does not provide click data.
Related concept
Read the scenario before looking for a memorised answer.
✓
EmailUrlInfo and DeviceNetworkEvents
Why this is correct
EmailUrlInfo records when a user clicks a URL in an email. DeviceNetworkEvents logs network connections. Joining on the URL's domain or hash allows linking click to subsequent connection.
Related concept
Read the scenario before looking for a memorised answer.
✗
EmailAttachmentInfo and DeviceProcessEvents
Why it's wrong here
EmailAttachmentInfo is for attachments, not URLs. DeviceProcessEvents logs process creation, not network connections.
✗
EmailEvents and DeviceFileEvents
Why it's wrong here
EmailEvents lacks URL click details, and DeviceFileEvents logs file operations, not network connections.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse EmailEvents (email metadata) with EmailUrlInfo (URL click data), assuming the email event table contains the URL click details, when in fact EmailUrlInfo is the dedicated table for that telemetry.
Detailed technical explanation
How to think about this question
Under the hood, EmailUrlInfo stores each URL from the email body along with a click action timestamp and the user identity, while DeviceNetworkEvents captures outbound connections with the destination URL or IP. A join on the URL field (or normalized domain) allows correlation of the click event with the subsequent network flow, even if the URL is redirected. In real-world scenarios, this join helps detect time-of-click vs. time-of-execution gaps, such as when a user clicks a link but the device connects hours later after a reboot.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: EmailEvents and DeviceNetworkEvents — Option B is correct because EmailUrlInfo contains the URL click events from phishing emails, and DeviceNetworkEvents logs network connections from corporate devices. Joining these two tables on the URL value captures the full chain: the user clicking the malicious link and the device subsequently connecting to that site.
What should I do if I get this MS-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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