My question is, if machine A have two IP address X,Y.
Can it open port 80 twice,like X:80 and Y:80 ?
Say,is port unique by machine or by IP?
My question is, if machine A have two IP address X,Y. Can it open
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My question is, if machine A have two IP address X,Y.
Can it open port 80 twice,like X:80 and Y:80 ?
Say,is port unique by machine or by IP?
An IP address specifies a network interface (think an ethernet port on your computer or your WiFi connection). A port number specifies the process to which to route messages arriving on a given network interface. Hence you can use the same port number with different IP addresses, as they specify the port on which to listen on that given interface. Note, though, that you can even reuse a port number with the same IP address if you use the SO_REUSEADDR option when invoking the bind function.