112-57資格トレーリング & 112-57関連受験参考書

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EC-COUNCIL 112-57 認定試験の出題範囲：

トピック出題範囲
トピック 1
  • Computer Forensics Fundamentals: This module introduces the core concepts of computer forensics, including digital evidence, forensic readiness, and the role of investigators. It also explains legal and compliance requirements involved in forensic investigations.
トピック 2
  • Linux and Mac Forensics: This module explains forensic analysis techniques for Linux and Mac systems. It focuses on analyzing system data, file systems, and memory to recover digital evidence.
トピック 3
  • Computer Forensics Investigation Process: This module explains the phases of the forensic investigation process, including pre-investigation, investigation, and post-investigation. It also covers evidence integrity methods such as hashing and disk imaging.
トピック 4
  • Investigating Email Crimes: This module covers the basics of email systems and the process of investigating suspicious emails to identify potential cybercrime evidence.
トピック 5
  • Data Acquisition and Duplication: This module focuses on methods for collecting and duplicating digital evidence. It explains acquisition techniques, formats, and procedures used to create forensic images and capture system memory.
トピック 6
  • Dark Web Forensics: This module explains the investigation of dark web activities, including analyzing artifacts related to the Tor browser and identifying dark web usage on systems.
トピック 7
  • Malware Forensics: This module introduces malware investigation techniques, including static and dynamic analysis, and examining system and network behavior to understand malicious activity.
トピック 8
  • Understanding Hard Disks and File Systems: This module covers disk structures, types of storage drives, and operating system boot processes. It also explains how investigators analyze file systems and recover deleted data.

>> 112-57資格トレーリング <<

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多くの人々は高い難度のEC-COUNCIL認証112-57試験に合格するのは専門の知識が必要だと思います。それは確かにそうですが、その知識を身につけることは難しくないとといわれています。EC-COUNCIL業界ではさらに強くなるために強い専門知識が必要です。

EC-COUNCIL EC-Council Digital Forensics Essentials (DFE) 認定 112-57 試験問題 (Q27-Q32):

質問 # 27
Which of the following network protocols creates secure tunneling through which content obfuscation can be achieved?

正解：C

解説：
SSH (Secure Shell)is specifically designed to provide anencrypted channelover an untrusted network. In digital forensics and incident response, SSH is well known for supportingtunneling/port forwarding, where traffic for another protocol (for example, HTTP, database connections, or remote desktop) is encapsulated inside an SSH session. Because the SSH session encrypts payload data (and can also protect authentication and command content), the tunneled traffic becomesobfuscated to network monitoring toolsthat can only see metadata such as source/destination IPs, port numbers (often TCP/22), timing, and byte counts. This capability is frequently discussed in forensic references as a mechanism that can hinder content inspection and complicate attribution of user actions purely from packet payload analysis.
By contrast,SNMPis primarily for network management and monitoring, not secure tunneling.ARPresolves IP- to-MAC addresses on local networks and does not provide encryption or tunneling.UDPis a transport protocol that can carry data for many applications but provides no built-in security or tunneling features by itself.
Therefore, the protocol that creates secure tunneling enabling content obfuscation isSSH (C).
event logs) to establish user intent and sequence of actions. Therefore, the correct option isBrowsingHistoryView (B).


質問 # 28
Michael, a forensic expert, was assigned to investigate an incident that involved unauthorized intrusion attempts. In this process, Michael identified all the open ports on a system and disabled them because these open ports can allow attackers to install malicious services and compromise the security of the system or network.
Which of the following commands assisted Michael in identifying open ports in the above scenario?

正解：B

解説：
To identifyopen ports, investigators need a method that actively checks which TCP/UDP ports on a host are accepting connections. The commandnmap -sT localhostperforms aTCP Connect scanagainst the local system. In a connect scan, Nmap uses the operating system's normal networking API to attempt a full TCP three-way handshake to each targeted port. If the handshake completes, the port is reported asopen; if it is refused, it isclosed; and if filtered by firewall rules, it may appearfiltered. This directly supports Michael's objective of enumerating open ports so they can be reviewed and disabled to reduce the attack surface and prevent malicious services from being installed.
The other options do not enumerate open ports in the same way.netstat -ishows interface-level statistics (packets, errors) rather than listing listening services.netstat -rndisplays the routing table (routes and gateways), which helps understand network paths but not which ports are open.ifconfig <interface> -promisc relates to enabling/disabling promiscuous mode on an interface for packet capture, not port discovery.
Therefore, the command that assisted in identifying open ports isnmap -sT localhost (C).


質問 # 29
A forensic investigator is collecting volatile data such as system information and network information present in the registries, cache, DLLs, and RAM of digital devices through its normal interface.
Identify the data acquisition method the investigator is performing.

正解：A

解説：
The scenario describes the investigator collectingvolatileartifacts-specifically information inRAM, activeDLLs, system and network state, and transient data held incacheand similar runtime locations-through the device's normal interface while the system is running. In digital forensics documentation, this is the defining characteristic oflive acquisition(also called live response). Live acquisition is performed when the system remains powered on so that investigators can capture evidence that would be lost on shutdown, such as running processes, open network connections, logged-on sessions, loaded modules/DLLs, encryption keys, and portions of registry data that exist in memory or are actively changing.
By contrast,static acquisitionanddead acquisitionare conducted when the system is powered off (or the evidence drive is imaged outside the running OS), focusing primarily on persistent storage such as disk sectors and file system structures.Non-volatile data acquisitionrefers to collecting persistent data stored on media (e.g., files on disk), which does not match the emphasis on RAM and other volatile components in the question. Because the investigator is explicitly collecting volatile data from a running system via its normal interface, the correct method isLive acquisition (B).


質問 # 30
Bob, a network specialist in an organization, is attempting to identify malicious activities in the network. In this process, Bob analyzed specific data that provided him a summary of a conversation between two network devices, including a source IP and source port, a destination IP and destination port, the duration of the conversation, and the information shared during the conversation.
Which of the following types of network-based evidence was collected by Bob in the above scenario?

正解：B

解説：
The description matchessession data, often calledflow records(for example, NetFlow/IPFIX-style evidence).
In network forensics, session/flow evidence summarizes a communication "conversation" between two endpoints using the5-tuple(source IP, source port, destination IP, destination port, and protocol) and typically addsstart/end time or duration,bytes/packets sent, and sometimes directionality. This allows an investigator to reconstructwho talked to whom, when, and for how long, even when packet payloads are unavailable (because of encryption, storage limits, or privacy constraints).
"Full content data" refers to complete packet captures (PCAP) containing payload bytes; that is far more detailed and would include the actual transmitted content, not just a summary. "Statistical data" is broader aggregate metrics (overall bandwidth trends, interface counters) and generally lacks per-conversation attribution. "Alert data" comes from IDS/IPS/SIEM detections and represents triggered events or signatures, not a neutral conversation summary.
Because Bob's evidence contains per-connection identifiers (IPs/ports) and conversation duration-typical of flow/session summaries-the correct evidence type isSession data (C).


質問 # 31
Which of the following tools helps a forensics investigator develop and test across multiple operating systems in a virtual machine for Mac and allows access to Microsoft Office for Windows?

正解：D

解説：
A common requirement in macOS-focused forensic labs is the ability to runmultiple operating systemson a single Mac for controlled testing, malware detonation in a sandbox, reproduction of user activity, and validation of artifacts across platforms. This is typically achieved throughdesktop virtualization, where a hypervisor hosts guest operating systems (such as Windows and various Linux distributions) inside virtual machines.Parallels Desktop 16is a Mac virtualization solution built specifically to run Windows on macOS with strong integration features (such as shared clipboard, folder sharing, and "coherence" modes that allow Windows applications to appear alongside Mac applications). This capability aligns with the question's description: developing and testing across multiple OSs in VMs on a Mac and enabling use ofMicrosoft Office for Windowswithin that Windows guest environment.
The other tools do not fit.Riverbed ModelerandNetSimare primarilynetwork modeling/simulationtools used for network design and training, not desktop virtualization.Camtasiais used forscreen recording and video editing, which can support documentation but does not provide a VM environment. Therefore, the only option that directly provides cross-OS virtual machines on macOS and supports running Windows applications like Microsoft Office isParallels Desktop 16 (B).


質問 # 32
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