OSI

• ICT
• MBO
• Studiejaar 3

OSI MODEL

 Open Systems Interconnection Model

Een model dat verklaart hoe netwerken precies werken

7 lagen!

Hoeveel lagen heeft het OSI MODEL?

Wat is laag 3

1. Netwerk
2. Transport
3. Session
4. Data

Layer 1 Physical

Layer 1

To transmit bits over a medium To provide mechanical and electrical specifications
The major protocols used by this layer include Bluetooth, PON, OTN, DSL, IEEE.802.11, IEEE.802.3, L431 and TIA 449

Layer 2

This layer receives data from the physical layer and compiles it into a transform form called framing or frame. The principal purpose of this layer is to detect transfer errors by adding headers to data packets.

Layer 3

This is the most important layer of the OSI model, which performs real time processing and transfers data from nodes to nodes. Routers and switches are the devices used for this layer that connects the notes in the network to transmit and control data flow.

Kun je een Protocol noemen voor de Netwerklaag?

Layer 4

This layer transmits data from source to destination node.

UDP & TCP

Session Layer

The session layer provides the mechanism for opening, closing and managing a session between end-user application processes, i.e., a semi-permanent dialogue.

Presentation Layer

The presentation layer mainly translates data between the application layer and the network format. Data can be communicated in different formats via different sources. Thus, the presentation layer is responsible for integrating all formats into a standard format for efficient and effective communication.