A predictable network interface device name remains the same even after reboot. At boot time, interfaces have traditional names such as eth0 or wlan0 but on most machines running systemd, they are quickly renamed.
A predictable network interface device name ensures that the name of a network connection stays consistent, even after restarting the computer. Traditionally, network interfaces were given names like eth0 or wlan0 during startup. However, on some systems, especially those using systemd, these names could change, causing confusion.
So, after a system restart, the network interface keeps the same name making sure which network interface we are working with.
