CompTIA Network+ Practice Test

What is the function of a Network Interface Card (NIC)?

1. To amplify signal strength in a network

2. To enhance data storage capacities

3. To provide a physical connection for communication over a network

4. To manage external network connections securely

The correct answer is: To provide a physical connection for communication over a network

The function of a Network Interface Card (NIC) is to provide a physical connection for communication over a network. This component allows a computer or device to connect to a network, facilitating both wired and wireless communication. The NIC converts data into a format suitable for transfer over the network medium, whether it is through copper cables or wirelessly. Additionally, NICs carry unique MAC addresses, which help in identifying devices on the network, enabling effective data transmission to the correct destination. While other options touch on aspects of networking, they do not accurately reflect the primary role of a NIC. Amplifying signal strength, enhancing data storage capacities, and managing external network connections securely are functions related to other networking hardware and software, but they are not the primary responsibilities of a NIC. Understanding this distinction is crucial for recognizing the integral role that NICs play in network communication.