1. 'loopback' is a node, just like 'source' and 'destination'. A network is a mesh of 'nodes' joined by 'links'. Your Pharo program represents one of those nodes: It is the 'loopback' node.
2. The block in the #linksTowards:do: method is the action to take on a packet, depending on whether its destination is "you" (loopback), or something else. The flood algorithm is the simplest algorithm: "If the destination is not me, send the packet to everyone else (except the one who sent it to me)." However, there is the possibility of loops in the network, so a slightly better algorithm is to check "have I seen this packet before?" and if the answer is "yes", then drop it; otherwise send it via my links. This will prevent endless packet sending loops in your network. -t -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html
