Labels:text | screenshot | font | number OCR: Packet Type Value Description HELLO:MSG A massage indicating that a host has joined the multicast group. REPLY, MSG 2 A reply to the HELLO_MSG mes- sage, This message is sent directly to the host that sent the HELLO MSG message BYE MSG 3 A message indicating that a host is leaving the group. USER MSG A message from a user to the multicast. group. Figure 4: MChat message types