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| Certification Vendor: | EC-Council |
|---|---|
| Exam Name: | EC-Council Digital Forensics Essentials (DFE) |
| Exam Number: | 112-57 |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 60 |
| Exam Duration: | 120 minutes |
| Available Languages: | English |
| Related Certifications: | EC-Council Certified Ethical Hacker (CEH) EC-Council Computer Hacking Forensic Investigator (CHFI) |
| Exam Format: | Multiple Choice |
| Passing Score: | 70% |
| Exam Price: | $250 (USD) |
| Sample Questions: | EC-COUNCIL 112-57 Sample Questions |
| Exam Way: | Online Proctored / Testing Center |
| Pre Condition: | No formal prerequisites; basic understanding of IT and networking recommended. Ideal for beginners in digital forensics. |
| Official Syllabus URL: | https://www.eccouncil.org/digital-forensics-essentials/ |
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質問 # 40
Sarah, a forensic investigator, is working on a criminal case. She was provided with all the suspect devices.
Sarah employs an imaging software tool for duplicating the original data from the suspect devices. However, the tool she employed failed to image the data as the suspect version of the drive was very old and incompatible with imaging software. Hence, Sarah used an alternative data acquisition technique and succeeded in imaging the data.
Which of the following types of data acquisition techniques did Sarah employ in the above scenario?
正解：A
解説：
The key detail is that Sarah'simaging softwarecould not acquire the device because the drive wasvery old and incompatiblewith the software-based approach. In such situations, forensic practice recommends switching to an acquisition method that isless dependent on the operating system or specific imaging application compatibility, while still producing a forensic-accurate duplicate.Bit-stream disk-to-diskacquisition (also called forensic cloning) creates asector-by-sectorcopy of the entire source drive directly onto another physical drive. This method is commonly performed using dedicated duplicators or hardware-assisted workflows that can interface with legacy media more reliably than certain disk-to-image software utilities.
Sparse acquisition would intentionally capture only selected portions of a disk (used to reduce time/storage), which does not fit the goal of "succeeded in imaging the data" after a failure due to incompatibility. Logical acquisition captures only active files/folders through the file system and is not the preferred alternative when full forensic imaging is required, especially in criminal cases. Bit-stream disk-to-image-file is still software
/container dependent and is essentially what failed initially. Therefore, the most appropriate alternative that explains success with an older incompatible drive isBit-stream disk-to-disk (D).
質問 # 41
John, a forensic officer, was working on a criminal case. He employed imaging software to create a copy of data from the suspect device on a storage medium for further investigation. For developing an image of the original data, John used a software application that does not allow an unauthorized user to alter the image content on storage media, thereby retaining an unaltered image copy.
Identify the data acquisition step performed by John in the above scenario.
正解：D
解説：
The scenario emphasizes that John used an application (or mechanism) thatprevents alteration of the acquired image content, ensuring the image remainsunalteredand protected from unauthorized modification. In forensic acquisition standards, this corresponds toenabling write protectionduring imaging-commonly implemented using awrite blocker(hardware or controlled software write-protection) to prevent any writes to the source evidence and, where applicable, to protect the integrity of the evidence copy from accidental or unauthorized changes. The purpose is to preserve evidential integrity by ensuring that neither the original media nor the forensic image is modified during handling, analysis preparation, or transfer.
"Validated data acquisition" refers to confirming the image is an exact duplicate, typically by computing and comparing cryptographic hashes (e.g., MD5/SHA) of the source and the acquired image. While validation is essential, the question specifically highlightspreventing alteration, not verifying equality. "Sanitized the target media" is the step of wiping/clearing the destination drive before acquisition to avoid contamination, which is not what is described. "Planned for contingency" relates to operational planning for unexpected issues (equipment failure, encryption, power loss), not integrity protection. Therefore, the best match isEnabled write protection on the evidence media (A).
質問 # 42
Clark, a digital forensic expert, was assigned to investigate a malicious activity performed on an organization' s network. The organization provided Clark with all the information related to the incident. In this process, he assessed the impact of the incident on the organization, reasons for and source of the incident, steps required to tackle the incident, investigation team required to handle the case, investigative procedures, and possible outcome of the forensic process.
Identify the type of analysis performed by Clark in the above scenario.
正解：A
解説：
The activities described align withcase analysis, which is the structured, high-level evaluation performed at the beginning (and throughout) a digital forensic investigation to define scope, strategy, resources, and expected deliverables. Case analysis focuses on understanding theoverall incident context: how the organization is affected (business/operational impact), what is believed to have happened (incident reasons and likely source), and what must be done to control and investigate it (containment steps and investigative approach). It also includes planning elements such as identifying theinvestigation team composition(roles, skills, authority), definingproceduresto be followed (evidence handling, chain of custody, acquisition priorities, legal/HR requirements), and anticipating thepossible outcomes(reports, remediation actions, disciplinary/legal actions, or prosecution support).
By contrast,traffic analysisis narrowly focused on examining network packets/flows to infer communications and attacker behavior;log analysiscenters on parsing and correlating event records (firewall, server, endpoint logs); anddata analysistypically refers to examining acquired artifacts (files, memory images, timelines) for evidentiary content. Because Clark is assessing impact, cause/source, response steps, staffing, procedures, and outcomes-an overall investigative planning and evaluation function-the correct choice isCase analysis (B).
質問 # 43
Kane, an investigation specialist, was appointed to investigate an incident in an organization's network. In this process, Kane executed a command and identified that a network interface is running in the promiscuous mode and is allowing all incoming packets without any restriction.
In the above scenario, which of the following commands did Kane use to check whether the network interface is set to the promiscuous mode?
正解：B
解説：
Promiscuous mode is a network interface configuration in which the NIC passesall observed framesto the operating system, not only frames addressed to that host's MAC address. In investigations, this matters because promiscuous mode is commonly enabled bypacket sniffers, certain intrusion tools, or misconfigured monitoring software, and it can indicate covert traffic capture on a host.
On UNIX/Linux systems, the traditional command used to view interface flags and status isifconfig < interface name>. When an interface is set to promiscuous mode,ifconfigdisplays aPROMISCflag in the interface's status line, allowing an investigator to confirm whether the NIC is accepting all frames. This directly matches Kane's goal of checking if the interface is running in promiscuous mode.
The other commands do not provide this specific interface flag.nmap -sT localhostscans for open TCP ports, not interface modes.ipconfigis a Windows command (and does not take an interface name in that form to show PROMISC status), and it primarily reports IP configuration.netstat -ishows network interface statistics (packets, errors, drops) but typically does not explicitly indicate promiscuous mode. Therefore, the correct command isifconfig <interface name> (C).
質問 # 44
David, a cybercriminal, targeted a community and initiated anti-social campaigns online. In this process, he used a layer of the web that allowed him to maintain anonymity during the campaign.
Which of the following layers of the web allowed David to hide his presence during the anti-social campaign?
正解：C
解説：
The layer of the web most associated withmaintaining anonymityfor users and services is theDark Web. In digital forensics terminology, the Dark Web refers to services hosted on overlay networks (such as Tor hidden services) that arenot indexed by standard search enginesand are typically accessible only through specialized software and configurations. Its core characteristic is that it is deliberately designed to reduce traceability by routing traffic through multiple relays and separating identifying information (like the user's real IP address) from the destination. This makes attribution and geolocation significantly harder using traditional network logs alone, which is why adversaries often choose it to conduct covert communications, host content, or coordinate campaigns.
By contrast, theSurface Web(the regular, indexed portion of the web) is generally reachable through normal browsers and is easier to monitor and attribute using conventional ISP, server, and platform logs. "World Wide Web" is a general term for web content accessed via HTTP/HTTPS and does not specifically imply anonymity. TheDeep Webrefers to content not indexed by search engines (e.g., webmail, databases, authenticated portals), but it is not inherently anonymizing-many deep web resources are simply private or access-controlled. Therefore, the layer enabling David to hide his presence is theDark Web (C).
質問 # 45
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