VCA vSphere vMotion & Live Migration 1 — Questions and Answers
Question 1: What is the primary purpose of VMware vMotion?
- To migrate a powered-off virtual machine between hosts
- To live-migrate a running virtual machine between hosts with no downtime (Correct answer)
- To replicate virtual machine data to a remote site
- To clone a virtual machine to another datastore
Correct answer: To live-migrate a running virtual machine between hosts with no downtime
vMotion enables live migration of a running virtual machine from one ESXi host to another with zero downtime, maintaining all active network connections.
Question 2: Which shared resource is required between source and destination hosts for a vMotion migration to succeed?
- Shared CPU vendor (Intel or AMD)
- Shared storage accessible by both hosts (Correct answer)
- Shared RAM modules
- Shared local disk partitions
Correct answer: Shared storage accessible by both hosts
vMotion requires that both the source and destination ESXi hosts have access to the same shared storage (e.g., NFS, SAN) so the VM's disk files are reachable from the destination.
Question 3: What is the minimum recommended network bandwidth for a vMotion VMkernel adapter?
- 100 Mbps
- 256 Mbps
- 1 Gbps (Correct answer)
- 10 Mbps
Correct answer: 1 Gbps
VMware recommends at least a 1 Gbps dedicated network for vMotion to ensure fast memory-state transfer without impacting production traffic.
Question 4: What does Storage vMotion allow an administrator to do?
- Migrate a running VM's compute state to a different host
- Move a running VM's disk files to a different datastore without downtime (Correct answer)
- Copy snapshots to a backup datastore
- Convert VMDK format from thick to thin provisioning only when the VM is powered off
Correct answer: Move a running VM's disk files to a different datastore without downtime
Storage vMotion migrates a virtual machine's disk files (VMDKs) from one datastore to another while the VM remains powered on and running.
Question 5: Which VMkernel port must be enabled on an ESXi host to support vMotion traffic?
- Management VMkernel port
- vSAN VMkernel port
- vMotion VMkernel port (Correct answer)
- Fault Tolerance logging VMkernel port
Correct answer: vMotion VMkernel port
A VMkernel adapter with the vMotion service enabled must be configured on both source and destination hosts for vMotion migrations to occur.
Question 6: What happens to a virtual machine's active network connections during a vMotion migration?
- All connections are dropped and re-established after migration
- Connections are paused for up to 30 seconds
- Connections are maintained transparently with no interruption (Correct answer)
- Only UDP connections are preserved; TCP connections are dropped
Correct answer: Connections are maintained transparently with no interruption
vMotion preserves all active network connections of the virtual machine throughout the migration, providing a transparent experience to end users and applications.
Question 7: Which of the following is a prerequisite CPU requirement for vMotion between two ESXi hosts?
- Both hosts must have identical CPU clock speeds
- Both hosts must have the same number of CPU sockets
- Both hosts must use CPUs from the same vendor family (compatible instruction sets) (Correct answer)
- Both hosts must have the same amount of physical RAM
Correct answer: Both hosts must use CPUs from the same vendor family (compatible instruction sets)
vMotion requires CPU compatibility between source and destination hosts, meaning both must expose compatible CPU feature sets (same vendor family) to the virtual machine.
VCA vSphere vMotion & Live Migration 1
What is the primary purpose of VMware vMotion?