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DAC on Broadband is an enabling technology the purpose of which is to support the flexibility required by the next generation of "smart" routers. DAC on Broadband allows operators to remotely manage the life cycle of containerized applications and services. This negates the need for monolithic system image updates and allows for varied set of deployed services across the customer base where one size does not fit all.
Detailed info is mentioned in wiki page:  DAC on Broadband

Dac functionality in BPIR4.

For dac validation we need dobby, crun and dsm functionalities in the BPIR4 device. So all mentioned functionality has been brought to BPIR4 platform by including "dac" distro feature into the build, for reference follow mentioned jira.

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