VCP-VVF Admin (2V0-16.25) flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

ESXi scratch partition

A region on the ESXi boot device used to store logs and support bundles; if the boot device is small or is USB/SD, scratch is placed in RAM and lost on reboot.

ESXi lockdown mode

A host setting with Normal and Strict modes; Strict blocks direct connections such as SSH and the Host Client and allows management only through vCenter.

Host profile compliance

A vSphere feature that captures a reference host configuration, attaches it to other hosts, checks them for deviations, and remediates noncompliant settings.

Quick Boot

An ESXi feature that skips BIOS and hardware initialization during a reboot, shortening maintenance reboots on supported server hardware.

vsphere.local SSO domain

The default Single Sign-On domain created with vCenter; it holds the [email protected] account and is used for authentication and cross-vCenter linking.

Enhanced Linked Mode

Joining multiple vCenter Servers to the same SSO domain so users get a single inventory and a single login across all linked vCenters.

vCenter High Availability

An active, passive, and witness node deployment that keeps vCenter Server available if the active node fails, with the witness required for automatic failover.

VAMI

The vCenter Server Appliance Management Interface on port 5480, used for backup and restore, updates, and appliance-level configuration tasks.

Linked clone

A VM clone that shares its parent's base disk and stores only changes in a delta disk; it needs a parent snapshot and cannot outlive that parent.

Snapshot consolidation

The process of merging redundant delta disks back into the base disk after snapshots are deleted, reclaiming space and restoring a single-disk chain.

Content library

A container for VM templates, OVF/OVA files, and scripts that can be local, published, or subscribed, letting multiple vCenters share identical content.

Eager zeroed thick disk

A virtual disk whose blocks are zeroed at creation time; creation is slower but the format is required for Fault Tolerance and supported by clustering.

VLAN ID 4095

On a port group this ID marks traffic as trunked (VGT), letting the guest OS tag its own VLANs; ID 0 means no tagging is applied.

IP hash teaming

A NIC teaming policy that requires a link aggregation group such as LACP on the physical switch and distributes traffic by a hash of source and destination IP.

VMkernel adapter

A virtual host interface that carries host-level traffic such as management, vMotion, iSCSI, NFS, or vSAN, each bound to a specific TCP/IP stack.

Network I/O Control

A distributed switch feature that prioritizes and shapes host traffic by allocating shares, reservations, and limits per network resource pool.

VMFS6

The clustered VMFS version introduced with vSphere 6.5; it uses a 1 MB block, supports 512e drives, and allows virtual disks up to 62 TB.

Round Robin PSP

A path selection policy that rotates I/O across all active paths to a LUN with an optional IOPS limit per path; default for ALUA arrays.

vSAN RAID-5 FTT=1

An erasure-coded vSAN storage policy that tolerates one failure and needs at least four fault domains, consuming less capacity than RAID-1 mirroring.

VAAI ATS

An array integration primitive that lets ESXi perform atomic test-and-set locking of VMFS metadata directly on the storage array instead of through the host.

HA admission control

A policy reserving cluster capacity so failover hosts can restart protected VMs; options are cluster resource percentage, slot policy, and dedicated failover hosts.

EVC baseline

Enhanced vMotion Compatibility masks CPU features so hosts with different CPU generations present a common feature set and remain vMotion-compatible in a cluster.

DRS anti-affinity rule

A cluster rule that keeps specified virtual machines on different hosts; DRS honors it when placing or migrating the VMs.

Fault Tolerance

A feature that runs a secondary copy of a VM on another host in lockstep, surviving a host loss without downtime and supporting up to 4 vCPUs.

VMCA

The VMware Certificate Authority built into vCenter; it issues and manages machine and solution user certificates and can be subordinated to an enterprise CA.

Solution user certificate

A certificate that identifies a vCenter service such as vpxd or the inventory service when authenticating within Single Sign-On.

vpxuser account

The internal account vCenter creates on each ESXi host to manage it; it is used by vCenter and is not intended for interactive login.

vSAN encryption

Data-at-rest encryption for an entire vSAN datastore using an external key management server; it is independent of per-VM encryption settings.

esxtop %RDY

The percentage of time a virtual machine was ready to run but waiting for a physical CPU; sustained high values indicate CPU contention on the host.

vLCM desired-state image

A cluster-level specification listing the exact ESXi base image, add-ons, and components; vLCM remediates hosts to match it instead of using baselines.

vpxd.log

The main vCenter Server service log, located under /var/log/vmware/vpxd/ on the appliance, used to troubleshoot vCenter operations and API errors.

Support bundle

A collection of logs and configuration gathered by vm-support on ESXi or from the vCenter appliance, used for diagnostics and vendor support cases.