1. Requirements Analysis:
Subnet size (/24): Allows 232−24=2562^{32 - 24} = 256232−24=256 IPs.
Servers requiring isolation: Development servers and VDI servers.
Web, application, and database servers can share subnets.
2. Option Analysis:
A . Correct.
VDI: /25 (128 IPs): Adequate for 100 virtual desktops. ✅
Web, application, and database: /26 (64 IPs): Fits 10 + 10 + 10 = 30 servers. ✅ Development: /27 (32 IPs): Fits 15 development servers. ✅ VDI servers: /28 (16 IPs): Fits 7 VDI servers. ✅ B . Same as A. Correct. ✅ C . Incorrect.
Web, application, and database: /27 (32 IPs): Insufficient for 30 servers. ❌ D . Incorrect.
Allocates excessive IPs to each subnet (e.g., 64 IPs for VDI servers with only 7 devices). ❌
3. Final Decision:
Option A (or B) optimally divides the /24 subnet without wasting IPs and meets all isolation requirements.
4. Reference:
CompTIA Cloud+ Objectives:
Section 3.3 - Deploy cloud networking solutions, emphasizing efficient IP space division and subnetting.
CompTIA Study Guide: Detailed subnetting and network planning examples.