To facilitate WAN optimization Cisco has several options available.
One option is to deploy 2 (or more) WAAS capable routers e.g. 1941 with WAAS software (and the maximum RAM) talking to each other.
But then there is also a WAE option. This is a storage box with a harddisk, cpu and RAM.
I'm not sure what the WAE provides on top of just the router with WAAS software.
My question is: what is the difference between the two.
Do I need both options if I want WAAS to work in my WAN, or is the WAE an optional extension?
If so what extra does it provide?
I've had a look at the Cisco documentation available, but it just confuses me. They don't clearly differentiate the difference between the options and whether something is optional or required.