A network namespace is a logical copy of the network stack from the host system. Network namespaces are useful for setting up containers or virtual environments. Each namespace has its own IP addresses, network interfaces, routing tables, and so forth.

What is a Linux network namespace?

Linux network namespaces are a Linux kernel feature allowing us to isolate network environments through virtualization. For example, using network namespaces, you can create separate network interfaces and routing tables that are isolated from the rest of the system and operate independently.

What does interface mean in networking?

A network interface is the network-specific software that communicates with the network-specific device driver and the IP layer in order to provide the IP layer with a consistent interface to all network adapters that might be present.