>>1869216yellow is outside network connection, something like an individual server/computer sending data of user's main avatar directly to server or of their room to a node.
grey is nodes, either the server or a combiner which takes room traffic and processes it for the server to display in a simplified format. if something goes wrong it only affects one node's distribution of rooms, not the whole server.
orange is data actually displayed on stream, be it individual avatars or rooms.
red is rooms being displayed on stream. could have vertical dimensions too.