3. Terminology

3. Terminology

The technology described in this document is known as Dual-Stack Lite. The abbreviation "DS-Lite" will be used throughout this text.

This document also introduces two new terms: the DS-Lite Basic Bridging BroadBand (B4) element and the DS-Lite Address Family Transition Router (AFTR) element.

Dual-stack is defined in [RFC4213].

NAT-related terminology is defined in [RFC4787].

CPE stands for Customer Premise Equipment. This is the layer 3 device in the customer premise that is connected to the service provider network. That device is often a home gateway. However, sometimes computers are directly attached to the service provider network. In such cases, such computers can be viewed as CPEs as well.