Question about packet sniffers...?

Question

In order to actually sniff the data packets being transmitted within the LAN, and utilizing a wireless PCI adapter as the sniffing hardware, the other computer must also be wireless, right? Because the other computer on the LAN is hardwired in via the ethernet cable.

Answer 1

you are correct.  In order to monitor wireless packets you need a wireless adapter.  Just as you would need a standard NIC (hard line) to monitor LAN traffic.  

Assuming you have the proper adapters that can monitor traffic.  e.g. anything with omniPeek.  

Answer 2

yes only when you set your wired/wireless to have all parties access.

example: only administrator can do the job.