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NEW QUESTION # 30
Which of the following techniques is defined as the art of hiding data "behind" other data without the target's knowledge, thereby hiding the existence of the message itself?
Answer: A
Explanation:
Steganographyis the technique of concealing a messagewithin another seemingly harmless carrier(such as an image, audio file, video, or document) so that theexistence of the hidden message is not apparentto an observer. Digital forensics references distinguish steganography from encryption: encryption scrambles content but usually leaves visible indicators that protected data exists (ciphertext), while steganography aims to make the communication look ordinary, reducing suspicion. In practice, steganographic methods often embed data into redundant or less perceptible parts of the carrier, such as modifying least significant bits in pixel values, altering frequency components in audio, or inserting data into metadata or unused file structures.
The other options do not match the definition.Password crackingis an access technique to recover authentication secrets, not a concealment method.Artifact wipingis an anti-forensics method intended to remove traces (logs, files, slack space remnants), but it does not "hide behind" other data-it destroys or overwrites evidence.Program packerscompress/obfuscate executables to hinder static analysis and detection, but they still produce an executable whose presence is evident; they do not primarily hide messages inside benign files. Therefore, the described "hiding the existence of the message itself" corresponds toSteganography (C).
NEW QUESTION # 31
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?
Answer: A
Explanation:
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).
NEW QUESTION # 32
Which of the following layers of the TCP/IP model serves as the backbone for data flow between two devices in a network and enables peer entities on the source and destination devices to communicate with each other?
Answer: C
Explanation:
In the TCP/IP model, theTransport layeris responsible forend-to-end communication between peer entitieson the source and destination systems. "Peer entities" here refers to the corresponding transport components (and the applications that use them) on two different hosts communicating across a network. This layer forms the practical "backbone" of host-to-host data flow because it provides the mechanisms that allow data to be deliveredfrom one endpoint process to another endpoint processreliably or efficiently, depending on the protocol used.
The Transport layer includes protocols such asTCPandUDP. TCP supports connection-oriented communication with sequencing, acknowledgments, retransmissions, and flow control-features that are fundamental when reconstructing sessions during network forensic investigations (e.g., rebuilding a file transfer or a web session). UDP provides connectionless delivery used by many services where speed is preferred over guaranteed delivery, which is also significant in investigations of DNS, streaming, or certain malware communications.
By contrast, theInternet layerfocuses on logical addressing and routing (IP), theNetwork access layerhandles local delivery on the physical/link network, and theApplication layerprovides user-facing protocols.
Therefore, the layer enabling peer communication between endpoints is theTransport layer (C).
NEW QUESTION # 33
Which of the following measures is defined as the time to move read or write disc heads from one point to another on the disk?
Answer: B
Explanation:
Seek timeis the specific performance measure that describes how long a hard disk drive's actuator takes tomove the read/write heads across the plattersfrom the current track (cylinder) to the target track where the requested data resides. In traditional magnetic HDDs, the heads must be physically repositioned before any sector can be read or written, making seek time a core component of mechanical latency.
Digital forensics materials emphasize understanding this distinction because HDD mechanical behavior affectsacquisition duration, the feasibility of repeated scans, and why imaging or carving operations can take longer on fragmented media. It also helps explain why solid-state drives (SSDs), which have no moving heads, do not have seek time in the same sense and therefore behave differently during large-scale reads.
The other choices are broader or unrelated:access timetypically refers to thetotal time to retrieve data, commonly combiningseek time + rotational latency + transfer time.Delay timeis not the standard term for head movement in disk performance definitions.Mean timeis incomplete as written and is usually part of reliability metrics like mean time between failures, not head positioning. Therefore, the correct measure for head movement time isSeek time (C).
NEW QUESTION # 34
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.
Answer: C
Explanation:
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).
NEW QUESTION # 35
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