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Containers (e.g., Docker, Kubernetes) require specialized scanning tools to detect vulnerabilities.

Trivy (Option B):

Trivy is an open-source vulnerability scanner designed specifically for containers and Kubernetes environments.

It scans container images, repositories, and running containers for known vulnerabilities (CVEs).

The Nmap command nmap -sv -sT -p- 192.168.1.0/24 is designed to discover services on a network. Here is a breakdown of the command and its purpose:

Command Breakdown:

nmap: The network scanning tool.

-sV: Enables service version detection. This option tells Nmap to determine the version of the services running on open ports.

-sT: Performs a TCP connect scan. This is a more reliable method of scanning as it completes the TCP handshake but can be easily detected by firewalls and intrusion detection systems.

-p-: Scans all 65535 ports. This ensures a comprehensive scan of all possible TCP ports.

192.168.1.0/24: Specifies the target network range (subnet) to be scanned.

Purpose of the Scan:

Service Discovery (Answer: C): The primary purpose of this scan is to discover which services are running on the network's hosts and determine their versions. This information is crucial for identifying potential vulnerabilities and understanding the network's exposure.

Hunter.io is a tool used for finding professional email addresses associated with a domain. Here’s what it provides:

Functionality of Hunter.io:

Email Address Collection: Gathers email addresses associated with a target domain from various sources across the internet.

Verification: Validates the email addresses to ensure they are deliverable.

Sources: Aggregates data from public sources, company websites, and other internet databases.

Comparison with Other Options:

DNS Records (B): Hunter.io does not focus on DNS records; tools like dig or nslookup are used for DNS information.

Data Breach Information (C): Services like Have I Been Pwned are used for data breach information.

Web Page Information (D): Tools like wget, curl, or specific web scraping tools are used for collecting detailed web page information.

Hunter.io is specifically designed to collect and validate email addresses for a given domain, making it the correct answer.

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Search engine enumeration refers to using advanced search operators (e.g., Google Dorking) to find sensitive or misconfigured data exposed publicly on the internet. In this case, the administrator inadvertently posted firewall configuration details, and a tester likely used specific search queries to discover this data.

According to the CompTIA PenTest+ PT0-003 Official Study Guide (Chapter 3 – Passive Reconnaissance and OSINT):

“Search engine enumeration, often using dorking techniques, can uncover publicly available but sensitive data, such as configuration files, credentials, or documents unintentionally published online.”