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School/Analyse/OSI Model.md
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@ -67,5 +67,13 @@ The Network Layer is responsible for handling the data transfer between two diff
The Network Layer breaks up segments from the Transport layer into smaller chunks called [[Packets]]. The reverse happens on the receiving device (reassembling packets into segments). The Network Layer breaks up segments from the Transport layer into smaller chunks called [[Packets]]. The reverse happens on the receiving device (reassembling packets into segments).
Furthermore the Network Layer also finds the optimal path to travel from origin network to the destination network. This is called routing.
## 2. Data Link Layer ## 2. Data Link Layer
The Data Link Layer is responsible for handling the data transfer between two devices on the **same** network. (so a bit like the Network Layer)
The Data Link Layer also splits up packets into smaller chunks called a frame. The reverse happens on the receiving device (reassembling frames into packets).
Like the Network Layer the Data Link Layer is also responsible for flow control and error checking. However it only does this for inter-network communications. (Local network)
## 1. Physical Layer ## 1. Physical Layer