What is 0.0.0.0?

0.0.0.0 is known as the default route or the null address. It is a placeholder IP address and is used to represent all possible IP addresses in a networking context. It is commonly used in the routing tables and network configuration settings of devices. When a device sends data to 0.0.0.0, it is requesting that the data be sent to all possible IP addresses within the network. This is useful when a device needs to broadcast information to every device connected to the network. Additionally, 0.0.0.0 is also used as a source IP address when initiating a network connection.