본 고에서는 폭발적으로 증가하고 있는 이더넷 서비스를 코아 망 영역의 서비스 사업자 망에서 보다 효과적으로 수용하기 위한 기술들에 대해서 논의하고자 한다. 이더넷 서비스를 코아 망에서 제공하기 위한 이더넷 전송망 기술로는 패킷 스위치 기반의 이더넷 전송망, SONET/SDH 기반의 이더넷 전송망 그리고 캐리어 이더넷 전송망 기술이 있다. 현재 이러한 이더넷 전송망 기술들은 광 전송기술인 WDM, ROADM과 결합함으로써 보다 넓은 광 대역폭과 망 운영의 효율성을 가지고 코아 망 영역으로 그 영역을 확대해 나가고 있다. 본 고에서는 이들 기술 중에서 현재의 전송망 구조를 유지하면서 이더넷 서비스를 보다 효과적으로 수용하기 위한 SONET/SDH 기반의 이더넷 전송망 기술에 대해서 중점적으로 살펴보고 다른 기술들에 대해서는 간략하게 소개하는 것으로 한다.
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