미래 인터넷은 하부 네트워크 인프라를 바탕으로 그 위에 논리적 네트워크를 구성하는 오버레이 네트워크에서의 서비스가 대부분이 될 것이다. 이러한 오버레이 네트워크의 핵심적인 부분이 P2P 가술이다. P2P 기술은 기존의 클라이언트-서버 개념과 달리 단말들이 서로 연결되어 자원을 공유하여 참여함으로써 서버 기능과 클라이언트 기능을 동시에 수행하는 기술이다. 서비스 오버레이 구조에 대한 표준화는 IEEE P1903(NGSON)에서 진행 중이다. 이와 관련된 세부 기술인 P2P 기술에 대하여는, IETF의 P2PSIP, LEDBAT, ALTO, PPSP, DECADE 등의 워킹 그룹에서 보다 심도 있게 표준화를 진행하고 있다. 본 고에서는 IETF의 P2P 관련 워킹 그룹들의 표준화 현황 및 그 핵심 기술에 대해 살펴보고자 한다.
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