I can't set the IP address using the arp command. What should I do?

• The network cable may be disconnected. Connect the network cable. Also, check the network environment. The address of the router is set as the default gateway. Set the IP address of your computer for the default gateway temporarily. After setting the IP address, return the default gateway to the original value. Note: If you have a direct connection to the Internet (not dial-up), you may need to apply to the InterNIC to obtain an IP address. Ask your system administrator for more information.