I’m working on a project at a customer location this week and this particular project required me to install Centos 7+. Being an Ubuntu guy, I kicked and moaned for about 3 whole seconds and started the install. It went as smooth as you’d expect, however, I was greeted with no network connectivity once Centos rebooted. Mentally, I thought it was needing VMWare drivers or something but as it turns out, I just needed to enable the network interface.
vi /etc/sysconfig/network-scripts/ifcfg-<cardname>
Now change ONBOOT=No to ONBOOT=Yes
Then simply reboot and make sure you can get connected to the network.