| 摘要 |
<p>PURPOSE: To prevent communication through a domain which is not the member of the domain by transmitting only a data packet to which the flag of 'inside origin' is added to an external circuit. CONSTITUTION: The data packet coming into the domain 10 on a circuit is designated by a domain administrator so that it is transmitted through the domain 10 without a change. At the time of intending the packet to be transmitted on the external circuit, such packet is eliminated in one of nodes 11-13 or the routers 211, 221, 231, 241,.... The flags of 'inside origin' codes in the generation origin are added to the respective data packets whose generated origin is set to be the inside of the domain 10. Then, the data packets are provided with the codes until they are received in a terminating destination in the domain 10 or the 'inside origin' code is removed and are transmitted to the external circuit. Thus, the transit of the data packets passing through the domain is prevented.</p> |
