I am the assigned ART directorate reviewer for this document. These
comments were written primarily for the benefit of the ART area directors.
Document editors and WG chairs should treat these comments just like any
other last call comments.

The document describes  basic terms used in research and standardization work 
concerned with constrained-node networks. The text is clear and easy to read.

Since the document does not define any protocol, I see no issues in this document related to ART.

Nits:
1. The purpose of the note below Table 10 (the text in parentheses: "'Sx' stands for 'Size x'") is not clear to me.
If it is concerned with the Name column in this table, then it must be placed in some other place
(preferrably before the table with some explanatory words). And honestly in this case I see
no reason for this text, since the constration of name for all other tables is not explained.
If it is concerned with something else, then I wonder what it is (I failed to find other "S*" words in the draft).

2. Section 5.3
I do not think that reference to MSL in the context of B0 networks is relevant. MSL is only defined for TCP and I 
doubt if nodes connected to B0 network will use TCP. In any case, MSL in TCP is only concerned with the chance
for SN repeat after host reboots. Referring to COAP's MAX_LATENCY value (discussed in I-D.gomez-tiptop-coap) 
is more appropriate in this context, but its default value is 100 (and not 120 as MSL).

3. Section 5.3
I also think that 62.5 bytes calculated here must be rounded to the full number of bytes 
(I assume that all protocols operate on byte boundary and cannot send say 62.3 bytes to remain 
"responsive" in B1 networks).