NetworkManager
From DikapediaV2
In RHEL7, the default networking service is provided by NetworkManager, which is a dynamic network control and configuration daemon that attempts to keep network devices and connections up and active when they are available.
- Introduced in RHEL7
- Can configure network aliases IP addresses, static routes, DNS information, and VPN connections, as well as many connection-specific parameters.
- Traditional ifcfg type configuration files are still supported.
Nmcli
nmcli is a command-line interface tool that controls NetworkManager. Think of NetworkManager as the engine that manages your system's network connections, and nmcli as the dashboard that lets you interact with it.