Add lecture description

README.md

@@ -1,3 +1,17 @@
 # ST1Tutorials
+Solutions for the tutorial lessons of Applied Network Security 1 at CVUT FIT
 
-Solutions for the tutorial lessons of Applied Network Security 1 at CVUT FIT
+## Network Diagram
+This diagram shows the network topology as it should turn out after finishing this semester:
+
+### Segmented Version
+![Segmented View](./Segmented.svg)
+
+In this version, the different parts of the network are labelled:
+
+  - ***CORE*** <!--- ToDo: Add description -->
+  - ***DISTRIBUTION***  <!--- ToDo: Add description -->
+  - ***ACCESS***  <!--- ToDo: Add description -->
+
+### Unsegmented Version
+![Unsegmented View](./Unsegmented.svg)