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 length#22^{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.
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* 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.
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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. References:
* 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.