I'l looking to get into Cisco router configuration, and I think I have found an appropriate router to buy, however its a Cisco 1841 and therefore has two Fast Ethernet and two expansion slots, no WAN port.
Is a Cisco WIC-1B-S/T ISDN WAN Interface Card a special card, or does it just add an Ethernet port identical to the WAN port of many consumer routers like an Apple Airport or a Netgear WAN router?
Your Ethernet ports are WAN ports if you configure the router correctly.
An Apple Airport / Netgear WAN port is also a NAT port like FA0/0 or FA0/1 could be.
The WIC cards found at at this Cisco page provide additional Ethernet ports to NAT multiple subnets in your office to an exterior network.
HWIC's are commonly used as other than Ethernet adapters like Serial PPP or the bargain ISDN card you considered.
