notes/School/Analyse/Periode 1/Network Software.md

Network Software

Network software is a set of rules defining how a Packet should be handled on a network (creation, delivery, etc...).

These rules are defined as protocols

The standard model that everyone uses is the OSI Model

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Network Protocols

Network protocols defines the rules needed for multiple computers to communicate correctly with each other. You can compare it to our rules in natural languages.

• Protocols are divided into multiple layers (abstraction)
• Each layer has their own responsibilities.
• When a layer is replaced, other layers do not get affected. (Layers work independently)

Examples

• A user does not need to understand how WiFi works exactly, or how signal errors are handled. (Abstraction)
• We can replace the Ethernet cable of a computer with a WiFi module and the internet connection should work exactly the same. (Layers work independently)