defense in depth
in information security, the placing of multiple layers of security controls throughout an IT system to provide redundancy in the event a security control fails
en-GB/dɪfɛns ˈɪn ˈdɛpθ/
en-US/dɪˈfɛns ˈɪn ˈdɛpθ/
in information security, the placing of multiple layers of security controls throughout an IT system to provide redundancy in the event a security control fails