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21 장 전송층 (Transport Layer)
21.1 Duties
21.2 Connection
21.3 OSI Transport Layer
21.4 Summary
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Internetwork
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21.1 Duties of the Transport Layer
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Duties of the Transport Layer
Transport layer compared with data link layer
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Duties of the Transport Layer
Transport layer duties
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Duties of the Transport Layer
End-to-End Delivery~ oversee the end-to-end(source-to-destination)
delivery of an entire message
Addressing~ protocol stack or service point
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Duties of the Transport Layer
Service points
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Duties of the Transport Layer
Reliable Delivery
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Duties of the Transport Layer
Error Control
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Duties of the Transport Layer
Sequence Control
Segmentation and Concatenation
Sequence Numbers
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Duties of the Transport Layer
Sequence Control
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Duties of the Transport Layer
Loss Control
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Duties of the Transport Layer
Duplication Control
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Duties of the Transport LayerFlow Control(sliding window)
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Duties of the Transport Layer
Multiplexing
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21.1 Connection
End-to-End Delivery
Connection-oriented
connection establishment
data transfer
connection termination
Connectionless
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Connection
Connection establishment
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Connection
Connection Termination
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21.3 OSI 전송층 프로토콜전송 클래스
TP0: Simple class
TP1: Basic error recovery class
TP2: Multiplexing class
TP3: Error recovery and multiplexing class
TP4: error detection and recovery class
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OSI 전송층 프로토콜TPDU(Transport Protocol Data Unit)
length( 길이 ) : TPDU 의 바이트 수
Fixed parameters :
variavle parameter : 관리 정보
Data : 상위층으로부터 받은데이터
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OSI 전송층 프로토콜Connection-Oriented and Connectionless
Service