Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
An organization runs a critical database server on a VM in a public cloud. The VM uses an attached persistent block storage volume. The database must be migrated to a new VM with more resources in a different availability zone within the same cloud provider, with minimal downtime. The cloud provider does not offer a live migration feature across availability zones. Which of the following strategies BEST achieves minimal downtime?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Take a snapshot of the current volume, create a new volume from the snapshot in the target zone, and attach it to the new VM.
This approach requires the database to be stopped or made read-only to ensure snapshot consistency, resulting in downtime. It is not the best method when minimal downtime is required.
B
Distractor review
Use the cloud provider's live migration feature to move the VM to the target availability zone.
The question states the cloud provider does not offer live migration across availability zones, so this option is not available.
C
Distractor review
Export the VM as an OVA file, copy it to the target zone, and import it as a new VM.
Exporting an OVA requires the VM to be powered off, causing significant downtime. This method does not minimize downtime.
D
Best answer
Set up database replication to a new VM in the target zone, then cut over traffic once replication is caught up.
Continuous database replication allows the new VM to stay synchronized with the source with minimal lag. The cutover can be done quickly, resulting in very little downtime. This is the best strategy given the constraints.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A user reports intermittent network connectivity on a desktop computer. The technician observes that the Ethernet link light on the NIC turns off for a few seconds and then turns back on. The cable passes a wiremap test, the switch port is verified good with another device, and the NIC driver is updated. The issue occurs more frequently when the computer's case fan runs at high speed. Which of the following is the MOST likely cause?
Question 2
A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)
Question 3
A workstation is connected to a managed switch. It obtains a valid IP address (192.168.10.50) from the DHCP server, but it cannot ping the default gateway (192.168.10.1). The link light on both the workstation NIC and the switch port are solid green. Other workstations on the same switch CAN ping the default gateway successfully. The technician accesses the switch management interface and finds that the workstation's port is configured as an access port on VLAN 10. The default gateway is located on VLAN 20. An inter-VLAN router is configured but not explicitly allowing VLAN 10 access to VLAN 20. Which of the following is the MOST likely cause of the problem?
Question 4
A company develops a web application that relies on a custom library available only for a specific Linux distribution. They want to deploy the application in the cloud with minimal administrative overhead, but they need full control over the software stack, including the ability to install the custom library and configure the web server. Which cloud service model BEST meets these requirements?
Question 5
A company has a legacy virtual machine running on a deprecated hypervisor (Hyper-V). They want to migrate this VM to a new hypervisor (VMware vSphere) hosted in a private cloud while preserving the VM's configuration, installed applications, and data. The migration must be performed with minimal downtime. Which of the following methods is MOST appropriate?
Question 6
A company hosts a critical database on a virtual machine in a public cloud. The database requires persistent storage that must be retained even if the VM is terminated. The storage must also be accessible from multiple VMs simultaneously for a future high-availability configuration. Which type of cloud storage BEST meets these requirements?
FAQ
Questions learners often ask
What does this 220-1101 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Set up database replication to a new VM in the target zone, then cut over traffic once replication is caught up. — The goal is to minimize downtime while moving a database with persistent storage. A snapshot-based approach (option A) requires the database to be quiesced or stopped to ensure data consistency, causing significant downtime. Exporting as an OVA (option C) also requires the VM to be powered off, leading to more downtime. Since live migration across availability zones is not available, the best method is to set up continuous database replication (e.g., using native replication or a third-party tool) to a new VM in the target zone, and then perform a cutover. This can reduce downtime to seconds or minutes, depending on the replication lag. The new VM can be pre-provisioned with the same static IP configuration using the cloud's elastic IP or internal load balancer, and the block storage can be replicated asynchronously or separately migrated after the cutover, but the key is replicating the database data to minimize bulk transfer time during the outage window.
What should I do if I get this 220-1101 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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