I've been testing my changes to Tops-20 NFT and ran into what what I thought were some perhaps interesting results, viz:

NFT>i twonky
Attempting connection to TWONKY:: [31.37]
Maximum buffer size: 0!
Operating System: Tops-10, File System: Tops-10
DAP: 7.0, DECnet: 0.0

NFT>i ostara
Attempting connection to OSTARA:: [31.15]
Maximum buffer size: 4096
Operating System: Ultrix-32, File System: 13 (Unknown)
DAP: 7.0, DECnet: 1.0

Note that I am clipping the capability display for these examples.  By "interesting", I was surprised to find that Tops-10 is reporting a buffer size of zero, but more by it reporting a DECnet version of 0.0.  Where are these version numbers defined?  For Ultrix, I would assume that I need a more up-to-date list of file systems, given that the highest that DAP 5.6 states is 9 for OS-8 (!!)

As a comparison, this is what I see for VENTI2:: (Tops-20) and a random RSTS host.

NFT>i
Local Executor is: VENTI2:: [2.522]
Maximum buffer size: 4096
Operating System: Tops-20, File System: Tops-20
DAP: 5.6.1, DECnet: 2.0

NFT>i pirsts
Attempting connection to PIRSTS:: [29.205]
Maximum buffer size: 636
Operating System: RSTS/E, File System: RMS-11
DAP: 5.6, DECnet: 4.1

I want to sign on to MIM:: later to see what the RSX NFT client says; it's certainly possible that I am not displaying this correctly.