Virtual Ethernet devices, or veth, create tunnels between network namespaces, allowing seamless communication and functioning as both bridge and standalone devices.
To create a veth pair, you can use commands like 'sudo ip link add vethX type veth peer name vethY', which establishes two linked interfaces.
By default, veth devices are in a 'down' state and must be activated using 'sudo ip link set vethX up' and 'sudo ip link set vethY up'.
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