# IPv6 Concepts

[IP addresses](https://www.digitalocean.com/community/tutorials/understanding-ip-addresses-subnets-and-cidr-notation-for-networking) let machines communicate across a network. DigitalOcean Droplets are assigned IPv4 addresses by default. Enabling IPv6 on a Droplet gives you access to its 16 additional IPv6 addresses.

[An Introduction to Networking Terminology, Interfaces, and Protocols](https://www.digitalocean.com/community/tutorials/an-introduction-to-networking-terminology-interfaces-and-protocols#ip): A basic overview of core networking concepts, covering basic terminology, common protocols, and the responsibilities and characteristics of the different layers of networking.