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

2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan konsep jaringan model OSI

3 Outline Materi Layering model Model OSI 7 layer

4 OSI Open Systems Interconnection Developed by the International Organization for Standardization (ISO) Seven layers A theoretical system TCP/IP is the de facto standard

5 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

6 OSI Model

7 OSI layers

8 Komunikasi data model OSI

9 Physical Physical interface between devices  Mechanical  Electrical  Functional  Procedural OSI Layer -1

10 Physical Layer

11 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

12 Data Link Layer

13 OSI Layer - 3 Network Transport of information Higher layers do not need to know about underlying technology Not needed on direct links

14 Network Layer

15 OSI Layer - 4 Transport Exchange of data between end systems Error free In sequence No losses No duplicates Quality of service

16 Transport Layer

17 Session Control of dialogues between applications Dialogue discipline Grouping Recovery OSI Layer - 5

18 Presentation Data formats and coding Data compression Encryption OSI Layer - 6

19 Application –Means for applications to access OSI environment OSI Layer - 7

20 Summary of Layer Functions