Which two statements are true regarding Virtual SAN Fault Domains? (Choose two.)
A. They enable Virtual SAN to tolerate the failure of an entire physical rack.
B. Virtual SAN ensures that no two replicas are provisioned on the same domain.
C. Virtual SAN ensures that all replicas are provisioned on the same domain.
D. They require VMware High Availability (HA) to ensure component distribution across domains.
Correct Answer: AB
Managing Fault Domains in Virtual SAN Clusters If your Virtual SAN cluster spans across multiple racks or blade server chassis in a data center and you want to make sure that your hosts are protected against rack or chassis failure, you can create fault domains and add one or more hosts to each fault domain. A fault domain consists of one or more Virtual SAN hosts grouped together according to their physical location in the data center. When configured, fault domains enable Virtual SAN to tolerate failures of entire physical racks as well as failures of a single host, capacity device, network link or a network switch dedicated to a fault domain.
An administrator is configuring virtual machines to use Worldwide Port Names (WWPNs) to access the storage.
Which two conditions are required? (Choose two.)
A. The switches in the fabric must be N-Port ID Virtualization aware.
B. The virtual machines must be using passthrough Raw Disk Mapping (RDMp).
C. The virtual machines must be using Virtual Machine Disk (VMDK).
D. The switches in the fabric must be Storage I/O Control aware.
Correct Answer: AB
Explanation: N-Port ID Virtualization N-Port ID Virtualization (NPIV) is an ANSI T11 standard that describes how a single Fibre Channel HBA port can register with the fabric using several worldwide port names (WWPNs). This allows a fabric-attached N-port to claim multiple fabric addresses. Each address appears as a unique entity on the Fibre Channel fabric How NPIV-Based LUN Access Works NPIV enables a single FC HBA port to register several unique WWNs with the fabric, each of which can be assigned to an individual virtual machine. SAN objects, such as switches, HBAs, storage devices, or virtual machines can be assigned World Wide Name (WWN) identifiers. WWNs uniquely identify such objects in the Fibre Channel fabric. When virtual machines have WWN assignments, they use them for all RDM traffic, so the LUNs pointed to by any of the RDMs on the virtual machine must not be masked against its WWNs. When virtual machines do not have WWN assignments, they access storage LUNs with the WWNs of their host's physical HBAs. By using NPIV, however, a SAN administrator can monitor and route storage access on a per virtual machine basis. The following section describes how this works. Reference: https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp#com.vmware.vsphere.config_fc.doc_40/ esx_san_config/managing_san_systems/c_n-port_id_virtualization.html
Question 65:
Which two statements are true regarding iSCSI adapters? (Choose two.)
A. Software iSCSI adapters require vmkernel networking.
B. Independent Hardware iSCSI adapters offload processing from the ESXi host.
C. Dependent Hardware iSCSI adapters do not require vmkernel networking.
D. Independent Hardware iSCSI adapters require vmkernel networking.
Correct Answer: AB
: Software iSCSI Adapter A software iSCSI adapter is a VMware code built into the VMkernel. It allows your host to connect to the iSCSI storage device through standard network adapters. The software iSCSI adapter handles iSCSI processing while communicating with the network adapter. With the software iSCSI adapter, you can use iSCSI technology without purchasing specialized hardware.
Hardware iSCSI Adapter A hardware iSCSI adapter is a third-party adapter that offloads iSCSI and network processing from your host. Hardware iSCSI adapters are divided into categories. Dependent Hardware iSCSI Adapter Depends on VMware networking, and iSCSI configuration and management interfaces provided by VMware. This type of adapter can be a card that presents a standard network adapter and iSCSI offload functionality for the same port. The iSCSI offload functionality depends on the host's network configuration to obtain the IP, MAC, and other parameters used for iSCSI sessions. An example of a dependent adapter is the iSCSI licensed Broadcom 5709 NIC. Independent Hardware iSCSI Adapter Implements its own networking and iSCSI configuration and management interfaces. An example of an independent hardware iSCSI adapter is a card that either presents only iSCSI offload functionality or iSCSI offload functionality and standard NIC functionality. The iSCSI offload functionality has independent configuration management that assigns the IP, MAC, and other parameters used for the iSCSI sessions. An example of a independent adapter is the QLogic QLA4052 adapter. Hardware iSCSI adapters might need to be licensed. Otherwise, they will not appear in the client or vSphere CLI. Contact your vendor for licensing information
An administrator notices that there is an all paths down (APD) event occurring for the software FCoE storage.
What is a likely cause?
A. Spanning Tree Protocol is enabled on the network ports.
B. Spanning Tree Protocol is disabled on the network ports.
C. Spanning Tree Protocol is enabled on the storage processors.
D. Spanning Tree Protocol is disabled on the storage processors.
Correct Answer: A
: Configuration Guidelines for Software FCoE When setting up your network environment to work with ESXi software FCoE, follow the guidelines and best practices that VMware offers. Network Switch Guidelines Follow these guidelines when you configure a network switch for software FCoE environment:
1.
On the ports that communicate with your ESXi host, disable the Spanning Tree Protocol (STP). Having the STP enabled might delay the FCoE Initialization Protocol (FIP) response at the switch and cause an all paths down (APD) condition. The FIP is a protocol that FCoE uses to discover and initialize FCoE entities on the Ethernet.
2.
Turn on Priority-based Flow Control (PFC) and set it to AUTO.
3.
Make sure that you have a compatible firmware version on the FCoE switch.
What are two use cases for Fibre Channel Zoning in a vSphere environment? (Choose two.)
A. Increases the number of targets presented to an ESXi host.
B. Controls and isolates paths in a fabric.
C. Controls and isolates paths to an NFS share.
D. Can be used to separate different environments.
Correct Answer: BD
: Using Zoning with Fibre Channel SANs Zoning provides access control in the SAN topology. Zoning defines which HBAs can connect to which targets. When you configure a SAN by using zoning, the devices outside a zone are not visible to the devices inside the zone. Zoning has the following effects:
1.
Reduces the number of targets and LUNs presented to a host.
2.
Controls and isolates paths in a fabric.
3.
Can prevent non-ESXi systems from accessing a particular storage system, and from possibly destroying VMFS data.
4.
Can be used to separate different environments, for example, a test from a production environment.
An administrator runs the command esxcli storage core device list and sees the following output: mpx.vmhba1:C0:T0:L0 Display Name: RAID 5 (mpx.vmhba1:C0:T0:L0) Has Settable Display Name: false SizE. 40960 Device Type: Direct-Access Multipath Plugin: NMP Devfs Path: /vmfs/devices/disks/ mpx.vmhba1:C0:T0:L0 Status: off Is Local: true
What can be determined by this output?
A. The device is a being used for vFlash Read Cache.
B. The device is in a Permanent Device Loss (PDL) state.
C. The device is a local Solid State Device (SSD).
D. The device is in an All Paths Down (APD) state.
Which two features are deprecated in Network I/O Control 3 (NIOC3)? (Choose two.)
A. Class Of Service (COS) Tagging
B. Bandwidth Allocation
C. User-defined network resource pools
D. Admission control
Correct Answer: AC
: The upgrade of a NIOC to version 3 is disruptive. Certain functionality is available only in NIOC v2 and is removed during the upgrade to version 3: User-defined network resource pools including all associations between them and existing distributed port groups You can preserve certain resource allocation settings by transferring the shares from the user-defined network resource pools to shares for individual network adapters. Existing associations between ports and user-defined network resource pools In Network I/O Control version 3, you cannot associate an individual distributed port to a network resource pool that is different from the pool assigned to the parent port group. CoS tagging of the traffic that is associated with a network resource pool Network I/O Control version 3 does not support marking traffic that has higher QoS demands with CoS tags. After the upgrade, to restore CoS tagging of traffic that was associated with a user-defined network resource pool, use the traffic filtering and marking networking policy.
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