1) Configure VLANs and Inter VLAN Routing.

2) Configure loop free redundant network with more bandwidth using STP and Etherchannel.

3) Configure the router to provide DHCP services to the end devices in the network

4)Configure wireless LAN with WPA2 authentication 5) Configure a secure LAN network to mitigate all types of layer 2 attacks

6) Configure static route between branches and default route to ISP.

7)Verify your network connectivity between the branches. All end devices should be able to ping each other