rfc9313v3.txt   rfc9313.txt 
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mechanism for their specific deployment. This document provides a mechanism for their specific deployment. This document provides a
comparative analysis of the most commonly used mechanisms to assist comparative analysis of the most commonly used mechanisms to assist
operators with this problem. operators with this problem.
Five different IPv4aaS solutions are considered: Five different IPv4aaS solutions are considered:
1. 464XLAT [RFC6877] 1. 464XLAT [RFC6877]
2. Dual-Stack Lite [RFC6333] 2. Dual-Stack Lite [RFC6333]
3. lw4o6 (Lightweight 4over6) [RFC7596] 3. Lightweight 4over6 (lw4o6) [RFC7596]
4. Mapping of Address and Port with Encapsulation (MAP-E) [RFC7597] 4. Mapping of Address and Port with Encapsulation (MAP-E) [RFC7597]
5. Mapping of Address and Port using Translation (MAP-T) [RFC7599] 5. Mapping of Address and Port using Translation (MAP-T) [RFC7599]
We note that [RFC6180] gives guidelines for using IPv6 transition We note that [RFC6180] gives guidelines for using IPv6 transition
mechanisms during IPv6 deployment; that document addresses a much mechanisms during IPv6 deployment; that document addresses a much
broader topic, whereas this document focuses on a small part of it. broader topic, whereas this document focuses on a small part of it.
2. Overview of the Technologies 2. Overview of the Technologies
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