Which of the following would BEST meet the above requirements?

A cloud architect is designing the VPCs for a new hybrid cloud deployment.

The business requires the following:

✑ High availability

✑ Horizontal auto-scaling

✑ 60 nodes peak capacity per region

✑ Five reserved network IP addresses per subnet

✑ /24 range

Which of the following would BEST meet the above requirements?
A . Create two /25 subnets in different regions
B . Create three /25 subnets in different regions
C . Create two /26 subnets in different regions
D . Create three /26 subnets in different regions
E . Create two /27 subnets in different regions
F . Create three /27 subnets in different regions

View Answer

Answer: C

Explanation:

A /26 subnet is a subnet that has a network prefix of 26 bits and a host prefix of 6 bits. A /26 subnet can support up to 64 hosts (62 usable hosts) and has a subnet mask of 255.255.255.192. Creating two /26 subnets in different regions can best meet the business requirements for deploying a high availability, horizontally auto-scaling solution that has a peak capacity of 60 nodes per region and five reserved network IP addresses per subnet. Creating two /26 subnets can provide enough host addresses for the peak capacity and the reserved addresses, as well as allow for some growth or redundancy. Creating the subnets in different regions can provide high availability and horizontal auto-scaling, as it can distribute the workload across multiple locations and scale out or in based on demand.

Reference: CompTIA Cloud+ Certification Exam Objectives, page 15, section 2.8