IB Computer Science Topic A2.1.3: Function of Network Devices Key Definitions

Firewalls are security devices that monitor and control network traffic based on predetermined rules. They act as a barrier between trusted and untrusted networks.

Gateways are network devices that act as bridges between two networks using different protocols. They translate data formats and ensure seamless communication between disparate systems.

Modems (Modulator-Demodulators) convert digital data from a computer into analog signals for transmission over telephone lines or broadband connections.

NICs are hardware components that enable a device to connect to a network. They convert electrical signals into digital data and vice versa.

Routers are devices that direct data packets between networks. They determine the optimal path for data transmission using routing protocols and routing tables.

Switches connect devices within a Local Area Network (LAN). They manage the flow of data by forwarding packets to the correct destination based on MAC addresses.

WAPs extend a wired network by providing wireless connectivity. They convert wired Ethernet data into wireless signals and vice versa.