2.10.2 Changes in communication waiting process between the ANY and the IP binding methods
As an example, the illustrations below show how the communication waiting process changes when the JP1/Base communication protocol is the ANY or the IP binding method.
- Organization of this subsection
(1) Communication waiting process when JP1/Base is activated in the ANY binding method
|
|
![[Figure]](GRAPHICS/ZU012500.GIF)
hostA has an NIC to which IP addresses 10.0.0.10 and 10.0.0.11 are assigned. This host is assumed to be able to resolve its own host name only into IP address 10.0.0.10. (In fact, depending on the OS, the host might only be able to resolve one host name into one IP address.) hostX assumes that hostA is resolved by using IP address 10.0.0.10, and hostY assumes that hostA is resolved by using IP address 10.0.0.11.
When JP1/Base is activated in the ANY binding method on hostA, it can receive data from both hosts X and Y. In the ANY binding method, JP1/Base can receive data addressed to either 10.0.0.10 or 10.0.0.11 since it communicates with hosts by using only port numbers without considering IP addresses.
(2) Communication waiting process when JP1/Base is activated in the IP binding method
Next, the following figure shows the communication waiting process when the communication protocol of JP1/Base is the IP binding method.
|
|
![[Figure]](GRAPHICS/ZU012600.GIF)
When JP1/Base is activated in the IP binding method on hostA, it receives only data addressed to 10.0.0.10, and cannot recognize data addressed to 10.0.0.11. This is because hostA does not accept data whose IP address is different from its own, even when the port numbers are the same.