IP address assign in Linux has been perform by through two method
Dynamic configuration files
Static configuration files
Device configuration options Explanation
HWADDR- used to identify MAC address
BOOTPROTO- whether IP Address is assign by through DHCP or static IP if none mean it is static IP
ONBOOT-whether bring the device up automatically when the system boot.
TYPE- it specify which type of network interface has been used. If Ethernet mean specify Ethernet if it wireless Ethernet mean setting like type=wireless. If it is wifi-specific mean setting such as ESSID