Add sample Router connecting to Switcher

Author: mangledbottles

README.md

@@ -37,6 +37,30 @@ Communication between the Switcher, multiple Routers and multiple Clients is han
 | #5 | Router received message instructions from Client to send message over the network | Client -> Router |
 | #6 | Router received updated information about current Router | Switcher -> Router |
 
+## Project Functionality
+1. Switcher is started to commence the network
+2. 3 Routers are started and join the network
+3. A client ("Alice") joins the network and is connected by the Switcher
+4. A secondary client ("Bob") joins the network and is connected by the Switcher
+5. Alice sends a message to Bob
+6. The message is forwarded from Alice to Router 1 to Router 2 to Router 3 and finally to Bob.
+
+## Wireshark
+The following diagram shows the communication between the Switcher, Routers and Clients.
+
+### Example 1: Router connecting to Network via Switcher
+| No. | Time | Source | Destination | Protocol | Length | Info |
+| ---- | ---- | ------ | ----------- | -------- | ----- | ---- |
+| 5 | 10.382165 | 127.0.0.1 | 127.0.0.1 | UDP | 61 | 65469 -> 51510 |
+
+Payload
+| Hexadecimal Payload | Base10 Decoded |
+| ------------------- | -------------- |
+| 0000 0020 7b 22 74 79 70 65 22 3a 31 2c 22 6d 65 73 73 61 | {"type": 1, "messa} |
+| 0010 67 65 22 3a 22 52 6f 75 74 65 72 22 7d | ge":"Rou ter"}
+|
+
+Router on port 65469 is sending a message to the Switcher on port 51510 trying to join the network. Type is set to 1, as seen in [Communication Table protocol type 1](#1).
 
 ## References
 - [0] OpenFlow - https://en.wikipedia.org/wiki/OpenFlow