Network access protection method e.g. for LAN

摘要

The method involves reading a frame (TR) containing words transmitted between two terminals (STA,STB) following establishment of communication. A protection circuit authorises access between the terminals by reading allowed terminal interconnections from a list. On detection of an illegal communication, two disconnection frames (TRDA,TRDB) are transmitted respectively to the first and second terminals. The disconnection frames includes destination addresses corresponding to the first and second terminals.