Build a network computer

Some steps to build a network computer:

1/  Analyze requirement, Build network computer topology
2/ making list of network devices.
3/ Making network address
4/ How to connect the internet ? need load balancing between isp ?
5/ how branch connect to each other.
6/ Security the network by firewall, configuration firewall, VPN
7/ Make routing decision on routers, configuration router
8/ config Switch using STP, using VLAN, configuration Switch