IP cameras, also known as network cameras, are digital video cameras that can send and receive data via the internet or a computer network. They come in various shapes and sizes, and can be used for indoor or outdoor surveillance. Based on their features, IP cameras can be classified into categories such as indoor, outdoor, PTZ, wireless, and PoE. Indoor cameras are designed for monitoring homes or offices, while outdoor cameras are weatherproof and ideal for monitoring outdoor areas. PTZ cameras can be remotely controlled to pan, tilt, and zoom in on specific areas. Wireless cameras connect to a Wi-Fi network, and PoE cameras receive power and data through a single Ethernet cable. By understanding these categories, customers can choose the best camera for their specific needs.