A Brief Review of the QWK-Network Concept Most QWK based networks(including UN'I, INTELEC, and ILINK) are based on star topology. This consists of a central hub, a number of regional hubs and the nodes. Below is a simple diagram of the star topology network. 旼컴컴컴컴컴컴컴커 � � � Central HUB � � � 읕컴컴컴쩡컴컴컴켸 旼컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴� 旼컴컴컴좔컴컴컴컴커 旼컴컴컨컴컴컴컴컴커 旼컴컴컴컨컴컴컴컴컴� � � � � � � � Regional Hub � � Regional Hub � � Regional Hub � � � � � � � 읕컴컴컴컴쩡컴컴컴켸 읕컴컴컴컴쩡컴컴컴켸 읕컴컴컴컴쩡컴컴컴컴� 旼컴좔컴커 旼컴컴컴컫컴컨컴커 旼컴컨컴커 � � � � � � � 旼컨컴커旼컴좔커旼컨컴커旼컴좔커旼컴좔커 旼컨컴커旼컴좔커 � Node 납 Node 납 Node 납 Node 납 Node � � Node 납 Node � 읕컴컴켸읕컴컴켸읕컴컴켸읕컴컴켸읕컴컴켸 읕컴컴켸읕컴컴켸 The QWK format does not support routed messages so all systems involved in the network have all of the messages. A QWK based network is capable of private mail. The mail cycle begins with a node exporting any new messages. He then uploads the replies to his hub, after he downloads any new mail. Then he imports the new mail into his message base. The cycle then repeats the next day.