diff --git a/Networks/Lab 04.pkt b/Networks/Lab 04.pkt
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+version https://git-lfs.github.com/spec/v1
+oid sha256:d71fa45ef64524e6dbbdc638775b45b2a587336b7c54dd6ea6236d6bd014b99b
+size 58555
diff --git a/Tutorials/Lab 4 - Dynamic Routing/README.md b/Tutorials/Lab 4 - Dynamic Routing/README.md
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+# Lab 04 - Dynamic Routing
+> ***Objectives:***  
+> - Replicate Internet configuration by setting up a chain of 3 routers
+>   - `EE`: Enterprise switch (the switch of the company or home)
+>   - `ISP`: The router of the internet service provider
+>   - `NET`: The router of the provider of a website
+>   - `SERVER` the web server providing the website
+> - Set IP address of server and routers
+> - Enable OSPF protocol on all routers
+> - Try to ping the webserver from the `EE` router
+
+The lab is realized in `./Networks/Lab 04.ptk` in branch `feature/lab-4`
+
+## Router Configuration
+Router `EE`:
+```sh
+enable
+configure terminal
+hostname EE
+
+interface fastEthernet0/1
+ip address 1.0.0.1 255.0.0.0
+no shutdown
+
+interface fastEthernet0/0
+ip address 10.123.0.3 255.255.0.0
+no shutdown
+
+router ospf 1337
+network 1.0.0.0 0.255.255.255 area 0
+
+exit
+exit
+disable
+exit
+```
+
+Router `ISP`:
+```sh
+enable
+configure terminal
+hostname ISP
+
+interface fastEthernet0/0
+ip address 1.0.0.2 255.0.0.0
+no shutdown
+
+interface fastEthernet0/1
+ip address 2.0.0.1 255.0.0.0
+no shutdown
+
+router ospf 1337
+network 1.0.0.0 0.255.255.255 area 0
+network 2.0.0.0 0.255.255.255 area 0
+
+exit
+exit
+disable
+exit
+```
+
+Router `NET`:
+```sh
+enable
+configure terminal
+hostname NET
+
+interface fastEthernet0/0
+ip address 2.0.0.2 255.0.0.0
+no shutdown
+
+interface fastEthernet0/1
+ip address 3.0.0.1 255.0.0.0
+no shutdown
+
+router ospf 1337
+network 2.0.0.0 0.255.255.255 area 0
+network 3.0.0.0 0.255.255.255 area 0
+
+exit
+exit
+disable
+exit
+```
+
+## Test Change
+On Router `EE`:
+```sh
+enable
+ping 3.3.3.3
+disable
+exit
+```