Once you are done with network configuration, you need to run nmtui-connect to enable/disable network interface based on your need.
# nmtui-connect
In order to verify the network configuration settings, you can check the content of the interface file or you can issue the below commands.
# ifconfig ens3 # ip a # ping -c2 google.com
You can also use other useful network utilities such as ethtool and mii-tool to check the speed of network interface, and etc.
# ethtool ens3 # mii-tool ens3
