1.3.2 Wired and wireless networks, protocols and layers

1.3.2 Wired and wireless networks, protocols and layers

1. Layers

   • A protocol layer is simply a group or collection of network protocols that work at a similar level within the networking process
   • Layers of a protocol layer model should be independent of each other
   • Layers are commonly used in software development

2. Protocols

   • A network protocol can be thought of as several rules that define how data is transmitted between connected devices
   • Protocols exist for any data exchange between two devices