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1 Pertemuan 10 Arsitektur Jaringan Model OSI Matakuliah : H0174/Jaringan Komputer Tahun : 2006 Versi : 1/0

1 Pertemuan 10 Arsitektur Jaringan Model OSI Matakuliah: H0174/Jaringan Komputer Tahun: 2006 Versi: 1/0

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Pertemuan 10Arsitektur Jaringan Model OSI

Matakuliah : H0174/Jaringan Komputer

Tahun : 2006

Versi : 1/0

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Learning Outcomes

Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu :

• Menjelaskan konsep jaringan model OSI

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Outline Materi

• Layering model• Model OSI 7 layer

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OSI

• Open Systems Interconnection• Developed by the International Organization for

Standardization (ISO)• Seven layers• A theoretical system• TCP/IP is the de facto standard

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OSI - The Model

• A layer model• Each layer performs a subset of the required

communication functions• Each layer relies on the next lower layer to

perform more primitive functions• Each layer provides services to the next higher

layer• Changes in one layer should not require changes

in other layers

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OSI Model

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OSI layers

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Komunikasi data model OSI

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Physical

Physical interface between devices Mechanical Electrical Functional Procedural

OSI Layer -1

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Physical Layer

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Data Link• Means of activating, maintaining and

deactivating a reliable link• Error detection and control• Higher layers may assume error free

transmission

OSI Layer - 2

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Data Link Layer

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OSI Layer - 3

Network• Transport of information• Higher layers do not need to know about

underlying technology• Not needed on direct links

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Network Layer

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OSI Layer - 4

Transport• Exchange of data between end

systems• Error free• In sequence• No losses• No duplicates• Quality of service

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Transport Layer

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Session• Control of dialogues

between applications• Dialogue discipline• Grouping• Recovery

OSI Layer - 5

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Presentation• Data formats and coding• Data compression• Encryption

OSI Layer - 6

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Application– Means for applications to access OSI

environment

OSI Layer - 7

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Summary of Layer Functions