What term describes a person who gains unauthorized access to computer systems?

The term that describes a person who gains unauthorized access to computer systems is "hacker." This term is widely recognized in the field of cybersecurity and computer systems. Hackers are individuals who use their technical skills to exploit vulnerabilities in systems, often bypassing security measures to gain access to sensitive information or control over a system. While the term "hacker" can sometimes be broadly applied to anyone who enjoys programming or software development, in this context, it specifically refers to those who engage in unauthorized access.

The other options represent different roles within the technology field. A coder is typically involved in writing software and applications; an administrator manages and maintains systems and networks, ensuring they operate effectively and securely; and a network engineer designs, implements, and manages networks. Unlike hackers, these roles usually entail authorized and responsible access to systems, with a focus on legitimate operations rather than exploitation.