Cisco IOS (Internetwork Operating System)

Cisco IOS (Internetwork Operating System) is software that runs on Cisco network devices like routers and switches. It manages the hardware, enabling these devices to communicate efficiently across networks. IOS provides the functions needed to route data, manage security, and handle network traffic. Think of it as the brain or operating system of the device, ensuring everything works together smoothly and securely. It's essential for configuring, controlling, and maintaining enterprise and internet networks, allowing different devices to connect, share information, and operate reliably.