# PDU — 프레임, 패킷, 세그먼트의 차이 ## 계층마다 데이터 단위가 다른 이유 이더넷 통신을 공부하다 보면 "패킷을 전송한다", "프레임을 캡처한다", "세그먼트를 재조합한다" 는 표현이 섞여 나온다. 이것들은 같은 데이터를 가리키는 것처럼 보이지만, 엄밀히는 **어느…

# UART 프레이밍 & 보레이트 ## UART란? UART(Universal Asynchronous Receiver-Transmitter)는 **두 장치가 직렬로 데이터를 주고받는 통신 방식**입니다. 클럭 신호 없이 미리 정해진 속도(보레이트)로 통신합니다. ``` [ UAR…

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