IPv4, or Internet Protocol version 4, is a networking protocol that maps 32-bit IP addresses to devices on a network. IPv4 routes most of the network traffic on the internet.

IPv4 addresses are 32-bit integers conventionally written in dot-decimal notation, like

IPv4 Articles

Send outbound traffic from your Droplet over a reserved IP address.
Disable IPv4 to rely solely on IPv6.
Each Droplet is alloted 16 IPv6 addresses, one of which is configured automatically. Configure additional IPv6 addresses within this range to use different addresses for different purposes.