Final answer:
An inside attacker is someone with legitimate access to an organization who misuses that access to bypass security for malicious purposes. They are differentiated from external attackers by their position within the organization and can employ various methods to exploit vulnerabilities.
Step-by-step explanation:
An inside attacker best describes an agent who uses their technical knowledge to bypass security. This individual has legitimate access to an organization's networks or resources and misuses their privileges to conduct malicious activities. Unlike external threats that originate from outside of the organization, an inside attacker is someone within the organization, such as an employee, contractor, or business partner who has inside information and accesses the system with ill intent.
Hackers, whether internal or external, have a variety of methods to break into websites, to get people to click on links, and to lure people to give out personal information. Such attacks can come in the form of phishing, hacking into systems, installing malware, or even social engineering tactics to manipulate individuals into providing access to restricted areas or information.