| a) senders to address packets to all nodes in a group | b) senders to address to packets to any member of a group of nodes |
| c) receivers to listen for any given packet on the network | d) receivers to announce their presence to potential senders |
| a) senders to address packets to all nodes in a group | b) senders to address to packets to any member of a group of nodes |
| c) receivers to listen for any given packet on the network | d) receivers to announce their presence to potential senders |