The recovery point objective (RPO) is a metric that defines the maximum amount of data that can be lost or acceptable data loss in the event of a disaster or disruption. The RPO determines how frequently the backups should be performed and how far back in time the recovery should go. In this case, the RPO needs to be updated in the DR plan, as seven hours' worth of data loss is deemed unacceptable. The RPO should be reduced to a lower value, such as one hour or less, to minimize the data loss and meet the business requirements. Reference: CompTIA Cloud+ Certification Exam Objectives, Domain 3.0 Maintenance, Objective 3.2 Given a scenario, implement backup, restore, disaster recovery and business continuity measures.

A quota is a limit on the number of resources that a cloud account can create or use in a public cloud environment. If the cloud account tries to create more instances than the quota allows, it will receive a LimitedInstanceCapacity error, indicating that there is not enough available capacity to fulfill the request

One possible solution for the cloud administrator is to use object storage. Object storage is a type of cloud storage service that stores data as objects, which consist of data, metadata, and a unique identifier. Object storage can allocate a large number of digital files and images, as it can scale to petabytes of capacity and handle billions of objects. Object storage can also keep files for distributed access, as it can store data across multiple regions and zones, and provide high availability and durability. Object storage can also serve images directly to the user's browser, as it can generate public URLs for each object that can be accessed over the internet12.
NAS storage, file storage, and block storage are not the best solutions for these requirements, as they have some limitations compared to object storage. NAS storage and file storage store data as files in a hierarchical structure, which can be inefficient for managing a large number of files and images. Block storage stores data as blocks in a fixed structure, which can be wasteful for storing variable-sized files and images. NAS storage, file storage, and block storage also require a file system or a protocol to access the data, which can add complexity and overhead to the system12.

https://www.cloudflare.com/learning/cdn/what-is-a-cdn/
"A content delivery network (CDN) refers to a geographically distributed group of servers which work together to provide fast delivery of Internet content."

1. Understanding Subnet Requirements:
The subnet must accommodate between 800 and 900 devices.
Each subnet provides IP addresses based on its prefix length, calculated as 232−prefix length22^{32 - \text{prefix length}} - 2232−prefix length−2 (subtracting 2 for network and broadcast addresses).
2. Subnet Capacity Calculation:
A . 10.10.115.0/22:
Provides 232−22=10242^{32 - 22} = 1024232−22=1024 addresses. Suitable for 800-900 servers. ✅ B . 10.10.119.0/23:
Provides 232−23=5122^{32 - 23} = 512232−23=512 addresses. Insufficient for 800-900 servers. ❌ C . 10.10.120.0/23:
Same as B, provides 512 addresses. Insufficient. ❌
D . 192.168.1.0/23:
Same as B, provides 512 addresses. Insufficient. ❌
E . 192.168.1.0/24:
Provides 232−24=2562^{32 - 24} = 256232−24=256 addresses. Insufficient. ❌ F . 192.168.10.0/21:
Provides 232−21=20482^{32 - 21} = 2048232−21=2048 addresses. Suitable for 800-900 servers. ✅
3. Subnet Selection for Cloud Migrations:
For the given requirements, 10.10.115.0/22 (A) and 192.168.10.0/21 (F) are the best choices as they meet or exceed the capacity requirement.
It's important to avoid underestimating capacity to ensure scalability in a cloud environment.
4. Reference:
CompTIA Cloud+ Objectives:
Section 3.3 - Deploy cloud networking solutions, "Subnetting for efficient IP address allocation." Subnetting Calculations: Detailed in CompTIA Cloud+ study guides for network design and planning​.