What can WPA/WPA2 use for Encryption

[martin <martiniscool () gmail com>]

Hi all

We're in the process of installing a leased line between 2 offices  
which are isolated in the country side. The leased line uses  
"microwave" connectivity ... apparently. And uses WPA/WPA2 for  
encryption

I have 2 questions:
1. Can WPA/WPA2 encrypt traffic using any method other than a pre- 
shared-key ?  If so then what ??!!  My boss seems to think it can but  
I don't see how.  Can it use PKI for example ?

2. Technically a network question rather than a security question, but  
what exactly is microwave connectivity ?  Is it just Wi-Fi by another  
name ?  Is it part of the 802.11 standard ?

The 2nd question isn't so important, but I'm curious about the first  
one !!

Thanks
M

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