diff --git a/.obsidian/workspace b/.obsidian/workspace
index 905262c..2a7fbc6 100644
--- a/.obsidian/workspace
+++ b/.obsidian/workspace
@@ -9,7 +9,7 @@
         "state": {
           "type": "markdown",
           "state": {
-            "file": "School/Analyse/Network Software.md",
+            "file": "School/Analyse/IPV4.md",
             "mode": "source"
           }
         }
@@ -68,7 +68,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "School/Analyse/Network Software.md",
+                "file": "School/Analyse/IPV4.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -87,15 +87,15 @@
   },
   "active": "bc6e8ad9aa0f44c3",
   "lastOpenFiles": [
-    "School/Analyse/Network Software.md",
     "School/Analyse/IPV4.md",
+    "packet-enscapsulation-2.png",
+    "packet-encapsulation.png",
+    "School/Analyse/Network Software.md",
     "School/Analyse/Comminucation Mediums.md",
     "School/Analyse/Computer Networks.md",
     "School/Analyse/Network Hardware.md",
     "School/Analyse/Packet.md",
     "IP-packet.png",
-    "School/Analyse/OSI Model.md",
-    "School/Analyse/Layers/3. Network Layer.md",
-    "School/Analyse/Layers/4. Transport Layer.md"
+    "School/Analyse/OSI Model.md"
   ]
 }
\ No newline at end of file
diff --git a/School/Analyse/IPV4.md b/School/Analyse/IPV4.md
index 021ea5b..9855570 100644
--- a/School/Analyse/IPV4.md
+++ b/School/Analyse/IPV4.md
@@ -11,4 +11,14 @@ The header has a 20 byte fixed part an a variable length optional part.
 
 ![[IP-packet.png]]
 
-Some of the fields in a packet are not always used.
\ No newline at end of file
+Some of the fields in a packet are not always used.
+
+## Packet encapsulation
+Packets are encapsulated in data link frames (Ethernet)
+
+![[packet-enscapsulation-2.png]]
+
+## Fragmentation
+Mostly, data link frames are smaller in size than IP Packets
+
+In these cases the packet is split up into multiple parts (fragments) and each fragment is send in a separate frame.
\ No newline at end of file
diff --git a/School/Analyse/Network Software.md b/School/Analyse/Network Software.md
index ce9bcc4..4b89ae4 100644
--- a/School/Analyse/Network Software.md	
+++ b/School/Analyse/Network Software.md	
@@ -6,6 +6,8 @@ Network software is a set of rules defining how a [[Packet]] should be handled o
 
 The standard model that everyone uses is the [[OSI Model]]
 
+![[packet-encapsulation.png]]
+
 ## Network Protocols
 Network protocols defines the rules needed for multiple computers to communicate correctly with each other. You can compare it to our rules in natural languages.
 
diff --git a/packet-encapsulation.png b/packet-encapsulation.png
new file mode 100644
index 0000000..4e3348e
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diff --git a/packet-enscapsulation-2.png b/packet-enscapsulation-2.png
new file mode 100644
index 0000000..dee3a9f
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