Transcript OSI Layer - Binus Repository

Matakuliah
Tahun
Versi
: H0174/Jaringan Komputer
: 2006
: 1/0
Pertemuan 10
Arsitektur Jaringan Model OSI
1
Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• Menjelaskan konsep jaringan model OSI
2
Outline Materi
• Layering model
• Model OSI 7 layer
3
OSI
• Open Systems Interconnection
• Developed by the International Organization for
Standardization (ISO)
• Seven layers
• A theoretical system
• TCP/IP is the de facto standard
4
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
5
OSI Model
6
OSI layers
7
Komunikasi data model OSI
8
OSI Layer -1
Physical
Physical interface between devices
 Mechanical
 Electrical
 Functional
 Procedural
9
Physical Layer
10
OSI Layer - 2
Data Link
• Means of activating, maintaining and
deactivating a reliable link
• Error detection and control
• Higher layers may assume error free
transmission
11
Data Link Layer
12
OSI Layer - 3
Network
• Transport of information
• Higher layers do not need to know about
underlying technology
• Not needed on direct links
13
Network Layer
14
OSI Layer - 4
Transport
• Exchange of data between end
systems
• Error free
• In sequence
• No losses
• No duplicates
• Quality of service
15
Transport Layer
16
OSI Layer - 5
•
•
•
•
Session
Control of dialogues
between applications
Dialogue discipline
Grouping
Recovery
17
OSI Layer - 6
Presentation
• Data formats and coding
• Data compression
• Encryption
18
OSI Layer - 7
Application
– Means for applications to access OSI
environment
19
Summary of Layer Functions
20