SHA-512 is a tool that can generate a cryptographic hash value for any given data. A cryptographic hash value is a fixed-length string of bits that uniquely and irreversibly represents the data. SHA-512 is one of the variants of the Secure Hash Algorithm 2 (SHA-2) family, which is a widely used and standardized hash function .
SHA-512 can help users to verify software integrity by comparing the hash values of the software before and after downloading, installing, or transferring. If the hash values match, it means that the software has not been altered, corrupted, or tampered with. If the hash values differ, it means that the software may have been compromised, infected, or damaged .

Detailed
A . Containers: Containers provide lightweight, portable environments that include all dependencies for an application. This significantly speeds up deployment and allows portability across different environments.
References:
CompTIA Cloud+ CV0-003 Study Guide Chapter 11: Integrate Components into a Cloud Solution.

Hyperconverged infrastructure (HCI) is a type of deployment that combines compute, network, and storage resources in a single hardware appliance that is managed by an intelligent software layer. HCI simplifies the configuration and management of cloud resources, reduces hardware costs and complexity, and improves scalability and performance. Reference: CompTIA Cloud+ Certification Exam Objectives, Domain 1.0 Configuration and Deployment, Objective 1.2 Given a scenario involving requirements for deploying an application in the cloud, select an appropriate solution design.

One possible solution for the company to continue adding new customers and to maintain the required level of isolation from other tenants is to implement VXLAN. VXLAN is a network virtualization technology that can extend VLAN by adding a 24-bit segment ID, which allows up to 16 million unique virtual segments. VXLAN can encapsulate layer 2 Ethernet frames within layer 3 IP packets, and tunnel them across the underlying network. VXLAN can provide logical isolation and security for different tenants, as well as scalability and flexibility for large cloud computing environments1.