Propose a set of computer security recommendations taking into account the locative infrastructure and the computer service ports used in the self-service Merkar Supermarket. Identify the logical and topological structure of the network. List the computer service ports used by the Supermarket. Consult the risks associated with the listed ports. Perform tests to measure network security levels. Check physical installations such as rack location, fire protection systems and server cooling system. Review the status of security software such as antivirus or firewall. Propose the list of recommendations taking into account the risks and vulnerabilities identified.