Am I confused, or is this wrong?

When is a netmask for a ppp interface valid at 255.255.255.255?
I don't understand how a netmask of all f's could ever be correct?
As it means all information in the address is network and none is 
for host id.

Since when is a netmask even needed for a point to point link?

If I am wrong, I will go back into my shell from which I came...

Risner