Hello all, During the last OGF we have had very productive discussions, and I think we have made quite some progression. However, one thing that we were not able to agree on was terminology for links/circuits/connections/tubes. Enclosed with this email are two figures that I created based on terminology and figures in ITU-T G.805[1]. If you're interested in G.805, Freek has written a very readable report on it[2], and we have also written an article about modelling multi-layer networks[3]. Figure 1 shows several terms: - *connection point* is any point that can make a connection (the circles in the figures) - *network connection* is the terminated connection from A to B. - *link connection* is a direct connection between two connection points. - *subnetwork connection* is a connection between two connection points that you can not or do not want to describe the details of. - *tandem connection* is a concatenation of link connections Figure 2 shows a multi-layer network connection between X and Y. If we start from X, we first encounter an *adaptation* to a lower layer. Then we go through another link connection. At that connection point we use *multiplexing* to adapt to a lower layer to connection point A. Then we use the same network connection as in figure 1 to go to B, where we go through *multiplexing*, a *link connection*, and an *adaptation* to arrive at Y. Note that the multiplexed connection can also be viewed as a link connection on a higher layer. The same goes for the connection between X and Y, which is a link connection at the highest layer. And because the connection is therminated there, it is also a network connection. Please share your thoughts on this terminology! Jeroen. [1]: ITU G.805 standard: http://www.itu.int/rec/T-REC-G.805/ [2]: Introduction to ITU-T G.805, Freek Dijkstra et al.: http://staff.science.uva.nl/~fdijkstr/publications/G805-introduction.pdf [3]: A Multi-Layer Network Model Based on ITU-T G.805, Freek Dijkstra et al.: http://staff.science.uva.nl/~fdijkstr/publications/G805_Multilayer_Model.pdf -- My email address has changed to <vdham@uva.nl> (The science has disappeared from my address, but I'm still doing it)
