diff --git a/School/Analyse/OSI Model.md b/School/Analyse/OSI Model.md
index 5011743..e12d76d 100644
--- a/School/Analyse/OSI Model.md	
+++ b/School/Analyse/OSI Model.md	
@@ -36,7 +36,9 @@ The presentation layer is responsible for preparing the data so that it can be u
 
 For example, two devices can use different types of encoding on their data, the presentation layer will translate the data in a way that the Application Layer can understand.
 
-When sending sensitive data, we would like to encrypt the data so that its secure. The Presentation layer is responsible for encrypting and decrypting ingoing or ou
+When sending sensitive data, we would like to encrypt the data so that its secure. The Presentation layer is responsible for encrypting and decrypting ingoing or outgoing data.
+
+Also when sending of receiving data we sometimes want to compress the data so that 
 
 
 ## 5. Session Layer