If someone needs to have 2 x WAN interface in a Cisco Router,
does it usually mean serial interface or there is simply no way to figure out only from this content?
I am confused since WAN interface is a logical concept compared to
physical ports such as Giga Ethernet Interface or Serial Interface.
Thank you in advance
Could be any interface. Serial, fibre, copper ...
Main thing is the interface(s) must be a routable port.