The Network Topology describes the clients and wirings settings on the network. These determine the hardware and methods to be used and also affect the transmission speed and data processing. Source (in German language)
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How traffic flows on the network across the different connections? Let's give it a quick look on the following table.
|Red||→||Firewall||Closed, Use external access|
|Red||→||Orange||Closed. Use port forwarding|
|Red||→||Blue||Closed. Use port forwarding or VPN|
|Red||→||Green||Closed. Use port forwarding or VPN|
|Orange||→||Firewall||Closed, No services. Also no DNS nor DHCP for Orange|
|Orange||→||Blue||Closed, use DMZ pinholes|
|Orange||→||Green||Closed, use DMZ pinholes|
|Blue||→||Firewall||Closed, configure via access for Blue|
|Blue||→||Red||Closed, configure via access for Blue|
|Blue||→||Orange||Closed, configure via access for Blue|
|Blue||→||Green||Closed, use DMZ pinholes or VPN|