ABC is a large supermarket chain which also has online shopping and home deliveries It has a 24/7 service which runs on a central server allowing all customers to enter new orders at any time This is a business critical service which, if not available, may lead to customers turning to alternative supermarket chains offering similar services, resulting in immediate turnover loss and possible long term customer loss.

ABC is contemplating the implementation of a hot standby facility, not only to cover for emergency disaster recovery, but also to allow for business continuity, allowing necessary maintenance and updates without service interruption.

Which of the following cybersecurity objectives is ABC concerned about in this scenario?