Shoulder surfing is the direct observation technique of looking over someone's shoulder to get information like passwords or PINs.

Data diddling is the unauthorized alteration of data before or during its entry into a computer system.

A 'cracker' is specifically defined as someone who gains unauthorized access to computer systems or networks with malicious intent, often to commit theft, vandalism, or other illegal activities. While 'hacker' is a broad term that can encompass both ethical (white-hat) and malicious (black-hat) activities, 'cracker' precisely denotes the malicious actor. An 'Ethical Hacker' (or penetration tester) performs authorized security testing. A 'Cyber Security Analyst' works to protect systems from threats. A 'Network Administrator' manages and maintains network infrastructure.

Relatedness in ethics refers to the perceived proximity and connection to individuals who will be impacted by a decision.

Ethics provides a framework of moral principles that guide behavior and help determine the right course of action.

ARP stands for 'Address Resolution Protocol'. It is a crucial communication protocol operating at Layer 2 (Data Link Layer) of the OSI model. Its primary function is to map an Internet Protocol (IP) address (which operates at Layer 3) to a physical machine address, specifically a Media Access Control (MAC) address, within a local area network (LAN). When a device needs to send data to another device on the same network but only knows its IP address, it uses ARP to discover the corresponding MAC address. This MAC address is essential for framing data for transmission over the physical network medium.

In common parlance, and often in cybersecurity contexts, the term 'hacker' most frequently refers to an individual who gains unauthorized access to computer systems, networks, or data. While hackers may possess exceptional technical skills (Option A) and their motivations can vary (Option B describes 'ethical hackers' or 'penetration testers' — a specific type of hacker), the defining characteristic that universally applies to the general concept of hacking is the illicit or unapproved entry. Option D describes a positive community involvement unrelated to the core act of hacking.

The ECPA of 1986 protects wire, oral, and electronic communications while those communications are being made, are in transit, and when they are stored.

Biometrics are body measurements and calculations related to human characteristics used for authentication.

A strong password is fundamentally built upon unpredictability and complexity. Option A, 'A combination of uppercase and lowercase letters, numbers, and symbols,' directly addresses this by maximizing the character set available, making brute-force attacks and dictionary attacks significantly more difficult. Each additional character type exponentially increases the number of possible password combinations. Option B, while desirable for user experience, often conflicts with security requirements; easy-to-remember passwords are frequently easy-to-guess. Options C and D are explicitly discouraged by security best practices. Dictionary words (Option C) are vulnerable to dictionary attacks, and personal information (Option D) can often be gleaned through social engineering or public records, making them highly susceptible to compromise.