Explanation
A NIC (network interface card) is the computer component that allows for communication over a computer network. A NIC is a hardware device that connects a computer to a network cable or a wireless access point. A NIC enables the computer to send and receive data packets over the network using protocols such as TCP/IP (Transmission Control Protocol/Internet Protocol). A NIC has a unique identifier called a MAC (media access control) address that distinguishes it from other devices on the network. References : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 169.

Explanation
The scenario where an attacker is using subversive tactics to gain the trust of a target in order to obtain entry to a location or access to confidential information is best described as social engineering. Social engineering is a type of attack that exploits human psychology and behavior to manipulate people into performing actions or revealing information that benefits the attacker. Social engineering can take various forms, such as phishing, vishing, baiting, quid pro quo, pretexting, or tailgating. Phishing attack is a type of social engineering attack that involves sending fraudulent emails or messages that appear to come from legitimate sources to trick recipients into clicking on malicious links or attachments, or providing personal or financial information.
On-path attack is a type of network attack that involves intercepting or modifying data packets that are transmitted between two parties on a network.
Eavesdropping is a type of network attack that involves listening to or capturing data packets that are transmitted between two parties on a network.
References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 7: Security Concepts1