IPv4 Residual Deployment
| IPv6 transition mechanisms | 
|---|
| Standards Track | 
| Experimental | 
| Informational | 
| Drafts | 
| Deprecated | 
IPv4 Residual Deployment (4rd) is an IPv6 transition mechanism for Internet service providers for deployment of Internet Protocol version 6 (IPv6), while maintaining IPv4 service to customers. The protocol and sample applications are specified in RFC 7600.