Free 2V0-15.25 practice test: 30 questions with answers

Prechecks exist to catch blockers before any component changes, so the cause must be fixed and the check rerun before the upgrade continues. Turning off the check bypasses a safety gate, a manual install skips the workflow SDDC Manager tracks, and re-downloading the bundle does not address a host-level failure.

The management domain is the domain that runs the core VCF management components, including SDDC Manager. The other options describe tenant-only clusters, an unrelated vSAN behavior, or a backup-only role that the domain does not have.

Hosts must be commissioned in SDDC Manager so the platform inventories and validates them before they join a domain's cluster. Joining hosts directly through vCenter, creating an unnecessary management domain, or bypassing SDDC Manager all leave the fleet inventory inconsistent.

Running prechecks and confirming that the bundle applies both catch blockers before any component is changed. Turning off certificate validation weakens security without helping the upgrade, and deleting backups removes the recovery option if the upgrade fails.

A failed task should be diagnosed from its details and logs, and the root cause fixed before a retry, so the same failure does not repeat. Rolling back the whole fleet, running a parallel upgrade or deleting the task record each create new risk and lose the evidence needed to diagnose the failure.

A lookup error during validation usually means the component names do not resolve correctly in both directions, so the DNS records should be checked first. Renaming an unrelated vCenter Server or skipping validation does not fix the underlying name resolution problem.

Evacuating the host through maintenance mode protects running workloads before the host leaves the cluster. The other options change networking without evacuation, bypass the platform inventory, or reinstall software on a host that still carries live workloads.

Name resolution for the planned components and commissioned, unassigned hosts are standard prerequisites for domain creation. A reused vCenter name would clash with an existing component, and hosts do not need matching serial numbers.

SDDC Manager tracks commissioned hosts and coordinates lifecycle operations such as upgrades across the VCF fleet. The self-service portal, witness appliance and Edge node each serve a different purpose and do not own fleet inventory or lifecycle.

A vSAN cluster spreads data across its hosts, so uneven storage contributions leave some hosts overloaded and reduce usable capacity. A different ESXi build is a separate compliance problem, and the witness and DRS settings are unrelated to storage balance.

Certificates should be replaced through SDDC Manager workflows so the platform records the new certificate and keeps its inventory consistent. Manual copies, clearing inventory, or disabling checks leave the fleet records out of step with what is deployed.

SDDC Manager keeps its own record of service credentials, so the stored value must be updated through its password management to match. Adding local accounts, reverting passwords, or disabling authentication either bypasses the platform record or weakens security.

vCenter Single Sign-On supports directory identity sources, so adding the directory lets users authenticate with their existing accounts. Local ESXi root accounts, VMware Tools updates and vSAN encryption have nothing to do with directory-based sign-in.

Renewing certificates before expiry and rotating credentials through the platform keep services running and the fleet records accurate. Shared passwords and disabling TLS both weaken security, and neither removes the need to track credentials.

The witness host stores witness components that help the cluster reach quorum when a site fails, and it does not hold the full VM data. The other options describe data replicas, gateway duties or the vCenter role, none of which belong to the witness.

With no data migration, components stay on the host while it is out, so objects that depend on it can run with reduced redundancy. vSAN does not copy data to a witness or erase disks for this mode, and it does accept this choice.

The VM's network must be reachable on the destination, so the destination needs a matching port group for that network. VMware Tools, memory reservations and hardware version are unrelated to port group availability and do not fix the failure.

In vCenter HA, the passive node stays synchronized with the active node and takes over automatically if the active node fails. Serving API requests while the active node waits, holding vSAN witness data and acting as a read-only backup copy are all wrong descriptions of its role.

A Tier-0 gateway provides north-south connectivity through its uplinks to the physical network. A Tier-1 gateway without a Tier-0 has no path out, a firewall rule does not provide routing, and a management-only segment is not a route to the physical network.

A Tier-1 gateway reaches external networks through a connected Tier-0 gateway with working uplinks, so that path is the next thing to verify. Virtual disk sizes, a vCenter certificate and VMware Tools versions have no role in routing traffic out of the gateway.

Distributed port groups are defined once on the distributed switch and applied to every host attached to it, so configuration stays consistent. Standard switches and per-host port groups are configured host by host, and single-host uplinks cannot provide the shared configuration asked for.

A Virtual Private Cloud in NSX gives each project an isolated network space with its own subnets, without hand-building each gateway chain. The other choices are a storage cluster design, a host management interface and a vCenter grouping feature, none of which create project-level network isolation.

Generating a log bundle with the platform's own tooling collects the relevant component logs in one consistent package for support. Manual copies of whole file systems are slow and risky, and disabling or deleting logs removes the evidence needed to diagnose the failure.

vmkping sends test traffic from a VMkernel interface, and a chosen packet size reveals MTU problems along the path. esxtop reports resource usage, vmkfstools manages virtual disks and esxcli storage lists datastores, so none of them test MTU.

Small pings working while large transfers stall is the classic sign of an MTU mismatch that drops or fragments large frames along part of the path. A certificate, a VMware Tools version or a stale DNS record would not let small packets pass while blocking large transfers.

Comparing VLAN and port group settings on both hosts and checking MTU across the whole path are standard ways to isolate a network fault. Rebooting every host at once destroys the state you need, and permanently disabling a firewall weakens security without identifying the fault.

The Identity Broker mediates authentication so users can sign in to VCF Automation through an external identity provider. The other options describe snapshot storage, patch distribution and firewall policy, which are handled by different components.

Successful sign-in means authentication worked, so the failure is an authorization gap and the first check is the project role assignment for the user or group. Workstation drivers, local accounts and MFA settings do not control access to a project.

Project membership with narrowly scoped roles lets developers request resources inside their project without broad rights. Management-domain admin rights, a shared account and a vCenter per developer each either grant excess access or add needless infrastructure.

Least-privilege role assignment with regular membership reviews limits what each person can change and keeps access accountable. Shared accounts, universal owner roles and disabled audit logs each remove accountability or expose the platform.