diff --git a/School/Analyse/OSI Model.md b/School/Analyse/OSI Model.md
index 77faa12..9b2d363 100644
--- a/School/Analyse/OSI Model.md	
+++ b/School/Analyse/OSI Model.md	
@@ -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). 
 
+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
+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
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