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Lecture #13: Example Data Link Protocols.

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Presentation on theme: "Lecture #13: Example Data Link Protocols."— Presentation transcript:

1 Lecture #13: Example Data Link Protocols.
C o n t e n t s Types of services provided by DLL protocols Flow control functions Flow control protocols Stop-and-Wait protocols Sliding window protocols Go-back-n Selective Repeat/Reject Performance comparison HDLC Internet DLL protocols 4 7 9 11 12 19 21 23 24 27

2 Communication Functions according to the OSI Model
User application 1 ... Encryption/ decryption compression/ expansion Choice of syntax Session control Session to transport mapping management synch. Layer and flow Error recovery Multiplexing Connection control Routing Addressing Flow Data link establishment Synch Framing Access to transm. media Physical and electrical interface Activation/ deactivation of con. Application layer Presentation layer Session layer Transport layer Network layer Link layer Physical layer Framing: considers frame format/ length issues (incl. error detection/correction implementation Flow control: SAW, Sliding Window Error control: correction, detection, recovery (ARQ: SAW, GBN, SR)

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