Transport Layer (R1)

Transport Layer (R1) - CSCI 232 - Computer Networks...

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Unformatted text preview: CSCI 232 - Computer Networks Transport Layer George Blankenship 1 Transport Layer George Blankenship 1 CSCI 232 Computer Networking: Transport Layer George Blankenship Transport Layer George Blankenship 2 Lesson Outline Concepts Transport service entrance Addressing Connection Oriented/Connectionless Flow control and error control TCP UDP Transport Layer George Blankenship 3 Transport Layer Peer transport layer connects end systems Uses network layer to move TPDU Supplies data transportation service to applications Applications known by SAPs CSCI 232 - Computer Networks Transport Layer George Blankenship 2 Transport Layer George Blankenship 4 Transport Service Entrance Upper level requests service through the transport service entrance Control requests attach to transport service detach from transport service Data requests send data unit receive data unit Transport Layer George Blankenship 5 Requests Blocking requests requester held until request completes (as subroutine), single thread operation timers must be part of service Non-blocking requests requester progresses after request requester must check status of request requester may have multiple requests outstanding Transport Layer George Blankenship 6 Asymmetric Protocol Two different protocol state machines Server Dormant state is waiting for a request Accepts requests (open requests) from client Client Dormant state is not involved in a communication in any way initiates a dialog (open request) CSCI 232 - Computer Networks Transport Layer George Blankenship 3 Transport Layer George Blankenship 7 Addressing Application requests data transport to a target end system Target end system identified by an address...
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This note was uploaded on 09/03/2010 for the course CS 232 taught by Professor Susan during the Summer '09 term at GWU.

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Transport Layer (R1) - CSCI 232 - Computer Networks...

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