What is a key difference between a modem and a network interface card (NIC)?

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A modem provides internet access, while a NIC manages local area network (LAN) traffic.
A NIC connects to wireless networks, while a modem only supports wired connections.
A NIC is used to modulate signals, while a modem is used to demodulate signals.
A modem connects to the network, while a NIC connects individual devices.

Answer 1

The correct answer is: 1) A modem provides internet access, while a NIC manages local area network (LAN) traffic.

Feature	Modem	Network Interface Card (NIC)
Primary Function	Converts digital ↔ analog signals for internet access (e.g., DSL, cable).	Connects a device to a local network (LAN) (Ethernet/Wi-Fi).
Network Role	Bridges between a single device/network and an ISP (WAN).	Enables communication within a LAN (e.g., home/office network).
Signal Handling	Modulates (outgoing) and demodulates (incoming) signals.	Transmits/receives digital signals directly (no modulation).
Connection Type	Typically external (DSL/cable modem) or internal (PCIe).	Integrated (on motherboard) or add-on (USB/Ethernet/Wi-Fi).
Example Use Case	Connecting a home router to an ISP.	Connecting a PC to a router via Ethernet