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質問 # 11
What is an "exploit" in the hacking world?
正解：B
解説：
In the hacking world, an "exploit" is a specialized piece of software, a chunk of data, or a sequence of commands that takes advantage of a bug or vulnerability in a system to cause unintended or unanticipated behavior. The primary goal of an exploit is to gain unauthorized access to a computer system, escalate privileges, or trigger a denial-of-service condition. Exploits are the "keys" used by hackers to unlock the doors found during the scanning and vulnerability analysis phases.
Exploits are typically categorized into two types based on where they are launched:Remote Exploits, which work over a network without prior access to the target, andLocal Exploits, which require prior access to the system to increase privileges. Within the ethical hacking lifecycle, the "Exploitation" phase occurs after a vulnerability has been identified and verified. An ethical hacker uses a specific exploit code to demonstrate the real-world impact of a flaw, proving to the stakeholders that the vulnerability is not just a theoretical risk but a practical entry point for an attacker.
It is important to differentiate an exploit from malware (Option A); while an exploit is themethodused to get in, malware is thepayloaddelivered once the door is open. Understanding exploits is fundamental for security professionals, as it allows them to develop "signatures" for intrusion detection systems and provides the justification needed for urgent patch management. By mastering the use of exploits in a controlled environment, such as with the Metasploit Framework, ethical hackers can better defend systems by anticipating how a malicious actor would attempt to break through technical barriers.
質問 # 12
Is it possible to clone a web page?
正解：A
解説：
Yes, it is possible to clone a web page, making option B the correct answer. Web page cloning involves copying the structure, appearance, and content of a legitimate website, often for malicious purposes such as phishing or credential harvesting.
Attackers use cloning to trick users into believing they are interacting with a trusted site. Ethical hackers study this technique to demonstrate the risks of social engineering and help organizations implement defenses such as user education, domain monitoring, and email security controls.
Cloning does not typically require exploiting vulnerabilities; instead, it abuses publicly available content and human trust. This makes it a powerful and common attack vector.
Understanding web page cloning helps organizations recognize phishing threats and protect users from impersonation attacks. Ethical hackers use controlled demonstrations to raise awareness and improve detection capabilities.
質問 # 13
Which of the following is a network security protocol designed to authenticate and authorize remote users to securely access network resources?
正解：C
解説：
Secure Shell (SSH) is a robust cryptographic network protocol utilized for operating network services securely over an unsecured network. Its primary application is the secure remote login to computer systems by administrators and users. Unlike earlier protocols such as Telnet or rlogin, which transmitted data (including passwords) in plain text, SSH provides a secure, encrypted channel. It achieves this through a suite of cryptographic techniques that ensure theconfidentiality,integrity, andauthenticityof the data being transmitted between the client and the server.
The protocol operates using a client-server architecture, where an SSH client initiates a connection to an SSH server. SSH facilitates both authentication and authorization. Authentication is typically performed using either a password or, more securely, a public-private key pair. Once the user's identity is verified, the protocol authorizes the level of access based on the server's configuration. Beyond simple terminal access, SSH supports secure file transfers (SFTP) and port forwarding, allowing other network protocols to be "tunneled" through its encrypted connection. From a security standpoint, while SSH is highly secure, it can be breached if misconfigured-such as by allowing weak passwords or failing to disable root login. Consequently, ethical hackers prioritize hardening SSH services as a fundamental control in protecting organizational assets.
質問 # 14
What is Shodan?
正解：C
解説：
Shodan is aspecialized search engine designed to discover and index internet-connected devices, making option C the correct answer. Unlike traditional search engines that index websites, Shodan scans IP addresses to identify exposed services, open ports, device banners, and system metadata.
Shodan is widely used by ethical hackers, security researchers, and defenders to identify misconfigured or exposed systems such as webcams, routers, servers, industrial control systems, and IoT devices. It provides insight into how devices are exposed to the public internet.
Option A is incorrect because Shodan is not an application for food services. Option B is incorrect because Shodan does not function as a web browser or general-purpose search engine.
From an ethical hacking perspective, Shodan is often used duringpassive reconnaissanceto assess external attack surfaces without directly interacting with target systems. This helps organizations identify exposure risks before attackers exploit them.
Understanding Shodan reinforces the importance of proper configuration, firewall rules, and access control.
Ethical hackers use Shodan responsibly to demonstrate how easily misconfigured devices can be discovered and targeted, encouraging stronger perimeter security and monitoring practices.
質問 # 15
What is a private IP?
正解：A
解説：
A private IP address is a fundamental element of network architecture used to enable communication between devices within a local network, such as a home, office, or enterprise environment. Unlike public IP addresses, which are globally unique and assigned by Internet Service Providers (ISPs) to identify a specific gateway to the internet, private IP addresses are reserved for internal use only. They are not routable on the public internet, which means a device with a private IP cannot be directly accessed by an outside computer without passing through a router or firewall.
The use of private IPs is governed by standards like RFC 1918, which defines specific ranges of addresses for private use, such as 192.168.x.x, 10.x.x.x, and 172.16.x.x through 172.31.x.x. This system allows thousands of devices on a local network to share a single public IP address through a process called Network Address Translation (NAT). This not only conserves the limited supply of IPv4 addresses but also provides a basic layer of security, as internal devices are effectively "hidden" from the public web.
For an ethical hacker, understanding the distinction between public and private IPs is crucial during the reconnaissance and scanning phases of a penetration test. During an internal pentest, the researcher will be working almost exclusively with private IPs to map out the organization's servers, workstations, and printers.
In contrast, an external pentest focuses on the public IP of the organization's perimeter. Identifying a device's private IP can reveal its role in the network and help a tester understand the internal topology. Because private IPs are the "language" of local communication, securing the internal network involves ensuring that these private addresses are not being leaked or "spoofed" to gain unauthorized access to sensitive internal resources.
質問 # 16
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