VCP Data Center Virtualization 5 — Questions and Answers
Question 1: In vSphere, what is the admission control policy used for in a vSphere HA cluster?
- To prevent unauthorized users from powering on VMs
- To reserve cluster capacity so VMs can be restarted after a host failure (Correct answer)
- To limit the number of snapshots per VM
- To enforce VM hardware version compatibility
Correct answer: To reserve cluster capacity so VMs can be restarted after a host failure
HA admission control ensures the cluster always has enough reserved capacity to restart all VMs from the maximum number of tolerated host failures.
Question 2: Which protocol does NFS datastores in vSphere rely on for communication between ESXi hosts and the storage server?
- Fibre Channel
- iSCSI over TCP/IP
- NFS over TCP/IP (NFSv3 or NFSv4.1) (Correct answer)
- NVMe over Fabrics
Correct answer: NFS over TCP/IP (NFSv3 or NFSv4.1)
ESXi connects to NFS datastores using NFS v3 or v4.1 over standard TCP/IP network connections.
Question 3: What is the purpose of vSphere Update Manager (VUM) / vSphere Lifecycle Manager (vLCM)?
- Managing virtual machine snapshots across the cluster
- Automating the patching and upgrading of ESXi hosts and VM hardware/tools (Correct answer)
- Monitoring performance baselines for VMs
- Provisioning new ESXi hosts via PXE boot
Correct answer: Automating the patching and upgrading of ESXi hosts and VM hardware/tools
vSphere Lifecycle Manager automates the scanning, staging, and remediation of ESXi patches, updates, and upgrades across all hosts in inventory.
Question 4: In VMware vSAN stretched cluster configuration, what is the role of the witness host?
- Stores all VM data for the secondary site
- Provides a tiebreaker vote to maintain quorum during a network partition between sites (Correct answer)
- Runs vCenter Server for the stretched cluster
- Handles all vSAN read I/O for performance
Correct answer: Provides a tiebreaker vote to maintain quorum during a network partition between sites
The witness host in a vSAN stretched cluster holds witness components and casts a tiebreaker vote to prevent split-brain scenarios during site isolation.
Question 5: What is the maximum number of ESXi hosts supported in a single vSphere cluster?
- 32
- 64
- 128 (Correct answer)
- 256
Correct answer: 128
A single vSphere cluster supports up to 128 ESXi hosts, allowing large-scale consolidation of workloads under a single DRS and HA domain.
Question 6: Which vSphere network feature prevents a VM from impersonating another VM's MAC address on the network?
- VLAN tagging
- Forged Transmits security policy set to Reject (Correct answer)
- Port mirroring
- Network I/O Control
Correct answer: Forged Transmits security policy set to Reject
Setting 'Forged Transmits' to Reject on a port group causes ESXi to drop outbound frames whose source MAC address differs from the VM's configured MAC, preventing spoofing.
Question 7: What is the function of VMware Tools installed inside a virtual machine?
- Provides the hypervisor kernel for the ESXi host
- Enhances VM performance and enables guest OS awareness features like quiesced snapshots and time synchronization (Correct answer)
- Encrypts VM disk files at rest
- Manages vCenter Server licensing
Correct answer: Enhances VM performance and enables guest OS awareness features like quiesced snapshots and time synchronization
VMware Tools is a suite of drivers and utilities that improve VM performance, enable balloon driver memory reclamation, quiesced snapshots, and host-guest time sync.
VCP Data Center Virtualization 5
In vSphere, what is the admission control policy used for in a vSphere HA cluster?