Network Layer (topology on a single layer) - This seems an important concept - topology on a layer.  A couple parts of this that I think may need definition: 1) how to tie together administrative domains with topology - for example one administrative domain may know about a subset of what another administrative domain knows; and 2) How do layers interact - is one layer carried by or used by another?

I skip partitioned device - I am not sure how it would apply for NSI