4.b To configure a fixed IP address, choose IP Address tab and check the Specify an IP Address option.
Then, enter an IP address into the empty field. Suggested IP Address Range is 192.168.1.1 to 192.168.1.253, and suggested Subnet Mask is 255.255.255.0.
Check this
4.a Configuring a dynamic IP address Check this
Enter a fixed IP address and Subnet Mask 
4.b Configuring a fixed IP address
5.Click OK. Then, click Yes when prompted to reboot the computer.
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