diff --git a/School/Analyse/OSI Model.md b/School/Analyse/OSI Model.md
index f96427f..780cdf2 100644
--- a/School/Analyse/OSI Model.md	
+++ b/School/Analyse/OSI Model.md	
@@ -52,6 +52,8 @@ The session layer also synchronizes the data transfer with checkpoints. For exam
 This way we do not need to completely resend the file. 
 
 ## 4. Transport Layer
+The Transport Layer is responsible for the end-to-end communication between 2 devices. The Transport layer takes data from the Session Layer and breaks them up in chunks called segments.
+
 
 
 ## 3. Network Layer