An essential part of your network
[033] Choosing a DHCP lease duration
When you connect to a local network, either via Wi-Fi or Ethernet, a DHCP (Dynamic Host Configuration Protocol) server on your network router will assign your device an IP address. This gives your device an ID that other devices can use to find and connect to it. Typically, this IP address will remain valid for about 24 hours before expiring.
This is due to DHCP lease time. This allows a local network to reassign IP addresses from devices that have been disconnected for a while to other devices, freeing up IP addresses for other devices that might connect (unless you give them a static IP address).
Unless otherwise specified, a typical network router will assume that any connection made to it is temporary. Your device is assigned an IP by the DHCP server with a lease time attached to it. If your device is not seen after that time has elapsed, the lease expires and the IP address is released for use by other devices.
