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Local connection PC via Ethernet cable connection address a machine under 192.168.1.123 192.168.1.146
Subnet mask: 255.255.255.0
The default gateway: 192.168.1.0
ARP: who has 192.168.1.123? Tell 0.0.0.0
Normal should be the who has 192.168.1.146? Tell 192.168.1.123