The Network column shows that the WAN zone has the physical port “eth1” as its interface.
An infotip appears when hovering the mouse over an icon.
The LAN zone (icon with two Ethernet ports) has the bridged interface “br-lan” which consists of one physical port (icon with one Ethernet port) and two wireless networks (each icon looking like a short standing fan) on the device. Hovering the mouse over each icon would give the name of the interface it represents.
In this example, the infotip shows that there is a (virtual) access point on the device with “M78” as its network name.
The following screenshot shows the Network Interface Overview with an IPv6 address.