vSphere Infrastructure & Networking Flashcards

Which protocol does vSphere use to enable encrypted vMotion migrations between ESXi hosts?

Answer: TLS 1.2 over TCP port 8000

Encrypted vMotion uses TLS 1.2 to encrypt migration traffic transmitted over TCP port 8000 between ESXi hosts.

What is the purpose of the ESXi DCUI (Direct Console User Interface)?

Answer: To provide local host management when the network or vCenter is unavailable

The DCUI provides a text-based console interface directly on the ESXi host for local management tasks such as network configuration and troubleshooting when vCenter is unreachable.

In vSphere, which cluster feature automatically restarts virtual machines on surviving hosts when an ESXi host fails?

Answer: vSphere HA

vSphere High Availability (HA) detects host failures and automatically restarts affected virtual machines on other healthy hosts in the cluster.

Which vSphere networking feature allows traffic from multiple VLANs to traverse a single physical network uplink?

Answer: VLAN trunking (802.1Q)

VLAN trunking using 802.1Q tagging allows multiple VLAN traffic streams to share a single physical uplink between a switch and an ESXi host.

What does 'VM hardware compatibility level' determine in vSphere?

Answer: The ESXi version features available to a VM and migration compatibility across hosts

VM hardware compatibility level (version) determines which vSphere features are available to a VM and the minimum ESXi host version required to run it.

Which vSphere Distributed Switch feature enables dynamic bandwidth allocation based on the type of traffic (vMotion, management, VM)?

Answer: Network I/O Control (NIOC)

Network I/O Control (NIOC) allows administrators to define bandwidth allocations and limits per traffic type to prevent any single workload from monopolizing uplink bandwidth.