Add the rest of university notes

docs/lectures/acn/11_connecting.md

@@ -102,7 +102,7 @@ Precedence
 
 - 95% allocated already (440,000 netblocks)
 
-**IPv6** supports 128 bit address
+**IPv6** supports 128-bit address
 
 - Loads of addresses :white_check_mark:
 - Routing protocols need to ported :negative_squared_cross_mark:
@@ -132,7 +132,6 @@ Because IPv6 did not magically solve address shortage problem and not all router
 
 ###### Full Cone
 
-![image-20220124180451508](/home/jay/.config/Typora/typora-user-images/image-20220124180451508.png)
 ```
 ea:ep - NAT address : NAT port
 ```
@@ -141,17 +140,12 @@ When client receives packet from server 1 `da:dp`, the NAT translates the NAT ad
 
 ###### Address Restricted Cone NAT
 
-![image-20220124181009792](/home/jay/.config/Typora/typora-user-images/image-20220124181009792.png)
 In this case server 2 is not trusted and therefore any request will be dropped.
 
 ###### Port Restricted Cone NAT
 
-![image-20220124181127801](/home/jay/.config/Typora/typora-user-images/image-20220124181127801.png)
-
 If the router receives a packet from a bad IP or bad port, it will be dropped.
 
 ###### Symmetric NAT
 
-![image-20220124181325935](/home/jay/.config/Typora/typora-user-images/image-20220124181325935.png)
-
 Here the internal address is obfuscated from the external servers, same client can use different ports for different communications.