Distributed Computing

I came across The Eight Fallacies of Distributed Computing today attributed to Peter Deutsch. The list is:

1.	The network is reliable
2.	Latency is zero
3.	Bandwidth is infinite
4.	The network is secure
5.	Topology doesn't change
6.	There is one administrator
7.	Transport cost is zero
8.	The network is homogeneous

I'm glad to say that these are all issues that we have explicitly addressed in our xdi work, except maybe, number 7 that I don't really understand.