UPLINK/WAN AND SEGMENTATION
Physically splitting a network into different function groups is known as “Network segmentation”. This is
done to improve performance (by reducing the amount of traffic on each segment) and to improve security.
It is achieved by connecting Routers together by their “WAN” or “UPLINK” ports.
If routers are connected without using their “WAN” or “UPLINK” ports, the result is a single segment: