CHFI Application, Email and Cloud Forensics Practice Question
This CHFI practice question tests your understanding of application, email and cloud forensics. 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.
In an email header, which field typically contains the IP address of the original sending client?
Why wrong: Return-Path specifies the email address for bounces, not the sending client's IP.
B
Message-ID
Why wrong: Message-ID is a unique identifier for the email, not an IP address.
C
Received
The Received header includes the IP address of the server that received the email. The bottommost Received header typically shows the originating client IP.
D
DKIM-Signature
Why wrong: DKIM-Signature is a cryptographic signature; it may contain a domain but not the sending IP.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Received
The 'Received' field in an email header is added by each mail transfer agent (MTA) that processes the message, and the first 'Received' header (at the bottom of the header block) typically contains the IP address of the original sending client (the SMTP client that initiated the connection). This field records the 'from' IP and the 'by' host, making it the definitive source for tracing the origin of the email.
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.
✗
Return-Path
Why it's wrong here
Return-Path specifies the email address for bounces, not the sending client's IP.
✗
Message-ID
Why it's wrong here
Message-ID is a unique identifier for the email, not an IP address.
✓
Received
Why this is correct
The Received header includes the IP address of the server that received the email. The bottommost Received header typically shows the originating client IP.
Related concept
Read the scenario before looking for a memorised answer.
✗
DKIM-Signature
Why it's wrong here
DKIM-Signature is a cryptographic signature; it may contain a domain but not the sending IP.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that the 'Return-Path' field contains the sender's IP address, when in fact it only holds the email address for bounce handling, not any network-layer information.
Detailed technical explanation
How to think about this question
Under the hood, each MTA prepends a new 'Received' header to the top of the existing headers, so the bottommost 'Received' header (the first one added) contains the IP of the initial SMTP connection (e.g., 'from [192.168.1.1]'). In real-world forensic analysis, investigators parse these headers in reverse order to reconstruct the full delivery path, and the originating IP may be obscured if the sender uses a relay or VPN, but the first 'Received' from the sender's MTA is the most reliable indicator.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Application, Email and Cloud Forensics — This question tests Application, Email and Cloud Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Received — The 'Received' field in an email header is added by each mail transfer agent (MTA) that processes the message, and the first 'Received' header (at the bottom of the header block) typically contains the IP address of the original sending client (the SMTP client that initiated the connection). This field records the 'from' IP and the 'by' host, making it the definitive source for tracing the origin of the email.
What should I do if I get this CHFI 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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Question Discussion
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