Character-Oriented Protocols

In a character-oriented protocol, data to be carried are 8-bit characters from a coding

system such as ASCII (see Appendix A). The header, which normally carries the source

and destination addresses and other control information, and the trailer, which carries

error detection or error correction redundant bits, are also multiples of 8 bits. To separate

one frame from the next, an 8-bit (I-byte) flag is added at the beginning and the end of a

frame. The flag, composed of protocol-dependent special characters, signals the start or

end of a frame. Figure 11.1 shows the format of a frame in a character-oriented protocol.


문자 지향 프로토콜에 대한 설명인데

are also multiples of 8 bits. -> 이게 뭐가 8비트의 배수라는 거임? 헤더? 트레일러? 아니면 두개 합친거?

앞에는 데이터는 8비트 단위로 전송된다 써있는데


데이터 = 헤더 + 트레일러 일 것이고

데이터 = 8비트인데

헤더나 트레일러 혹은 헤더+트레일러가 8비트를 초과할 수 있음??


내가 뭔가 잘못 이해한게 있음?