Update 01-introduction.md

documentation/design/01-introduction.md

@@ -4,8 +4,10 @@ Data networks consists out of a variety of different network elements, link type
 There are different approaches for network operations that are not only divided by their logical distinction but also how an implementer, typically network equipment vendor, is implementing the network elements and the particular operations. 
 
 We outline two basic approaches to network operation:
-* fully intergrated network operations of all networking planes, i.e., usually called the traditional approach.
-* separation of control- and data planes, i.e., usually called the Software Defined Networking (SDN) approch, though there have been implementations of this concept earlier than SDN with other names, e.g., Forwarding and Control Separation (ForCeS)
+
+1.  fully integrated network operations of all networking planes, i.e., usually called the traditional approach.
+2. separation of control- and data planes, i.e., usually called the Software Defined Networking (SDN) approch, though there have been implementations of this concept earlier than SDN with other names, e.g., Forwarding and Control Separation (ForCeS) and others. 
+
 
 ## Motivation