Exam AZ-305 topic 4 question 102 discussion

GIVEN SOLUTION IS CORRECT according to GPT-4 Number of Virtual networks: ✔ 2 Virtual machine size ✔ B-Series Explanation: Number of Virtual networks: You need at least one virtual network per Azure region for the local resources, hence since you have two Azure regions, you'll need at least 2 virtual networks. Virtual machine size: The B-Series VM size is the best choice here because of the ability to bank CPU credits during periods of low utilization. The B-series are burstable VMs that accumulate CPU credits during idle times and then consume these credits during periods of high CPU usage. This matches well with your requirement to minimize costs by accumulating CPU credits during periods of low utilization. Other series like A-Series, D-Series, and M-Series do not have this functionality.

This question is on today's exam 17-09-2023.

CORRECT

FFS Microsoft, what is the purpose of memorising these A/B/D/M classes?! Nobody will remember these and each time when need it IN REAL WORK LIFE we can look it up!

Correct. Number of Virtual networks: 2 Virtual networks and subnets span all availability zones in a region. You don't need to divide them by availability zones to accommodate zonal resources. For example, if you configure a zonal VM, you don't have to take into consideration the virtual network when selecting the availability zone for the VM. The same is true for other zonal resources. https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-overview#virtual-networks-and-availability-zones

"While traditional Azure virtual machines provide fixed CPU performance, B-series virtual machines are the only VM type that use credits for CPU performance provisioning. B-series VMs utilize a CPU credit model to track how much CPU is consumed - the virtual machine accumulates CPU credits when a workload is operating below the base CPU performance threshold and, uses credits when running above the base CPU performance threshold until all of its credits are consumed." https://learn.microsoft.com/en-us/azure/virtual-machines/b-series-cpu-credit-model/b-series-cpu-credit-model

B-series for bursts. 2 VNets for the two regions.