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www.certifyme.com Q:52 Assuming VLANs are not configured, which of the following is true about traffic from a virtual machine connected to a port group on a vNetwork Standard Switch with no uplinks?

A. Virtual machines in any port group on the virtual switch can receive the traffic

B. The virtual switch will drop the packets if no uplink is present

C. Virtual machines on 220 702 any virtual switch on the same ESX Server can receive the traffic

D. Only virtual machines in the same port group on the virtual switch can receive the traffic

Answer: A

www.certifyme.com Q:53 A network administrator has asked you to enable NetQueue to improve networking performance for virtual machines on an ESX Host. Where is this feature enabled (Choose Two)?

A. On the physical network adapter driver

B. On the virtual NIC in the virtual machine

C. On the Properties tab for the virtual switch

D. In the Advanced Settings for the VMkernel

Answer: A, D

www.certifyme.com Q:54 When configuring the vSwitch NIC teaming policy, what happens when the Notify Switches option is set to Yes?

A. The virtual switch is notified when the location of a physical NIC changes

B. The physical switch is notified when the location of a virtual NIC changes

C. The virtual switch is notified when the physical NIC link state changes

D. The physical switch is notified when the virtual NIC link state changes

Answer: B

www.certifyme.com Q:55 9L0-403 Which two statements are true about port groups and VLANs defined on a vNetwork Standard Switch (Choose Two) ?

A. Only one VLAN can be specified in a port group

B. Multiple VLANs can be specified in a port group

C. The same VLAN cannot be specified in multiple port groups

D. Multiple port groups can specify the same VLAN

Answer: A, D

www.certifyme.com Q:56 Which of the following describes the default behavior of uplinks added to a vNetwork Standard Switch?

A. All uplinks are active

B. The first uplink is active, additional uplinks are standby

C. The first uplink is active, additional uplinks are unused

D. Only one uplink can be attached to a virtual switch

Answer: A

www.certifyme.com Q:57 9L0-510 Traffic Shaping can be configured on the following vSphere elements (Choose Two)?

A. On a vNetwork Standard Switch port group or the entire vSwitch for outbound traffic only

B. On a vNetwork Distributed Switch dvPort or the entire dvPort Group for outbound traffic only

C. On a vNetwork Standard Switch port group or the entire vSwitch for inbound traffic only

D. On a vNetwork Distributed Switch dvPort or the entire dvPort Group for inbound and outbound traffic

Answer: A, D

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4. Assign each physical NIC to a port group and a vSwitch.

5. Use separate physical NICs to handle the different traffic streams, such as network packets generated by VMs, iSCSI protocols, VMotion

tasks, and service console activities.

6. Ensure that the physical NIC capacity is large enough to handle the network traffic on that vSwitch. If the capacity 220 701 is not enough, consider

using a high-bandwidth physical NIC (10Gbps) or moving some VMs to a vSwitch with a lighter load or to a new vSwitch.

7. If packets are being dropped at the vSwitch port, increase the virtual network driver ring buffers where applicable.

8. Verify that the reported speed and duplex settings for the physical NIC match the hardware expectations and that the hardware is

configured to run at its maximum capability. For example, verify that NICs with 1Gbps are not reset to 100Mbps because they are

connected to an older switch.

9. Verify that all NICs are running in full duplex mode. Hardware connectivity issues might result in a NIC resetting itself to a lower speed or

half duplex mode.

10. Use vNICs that are TSO-capable, and verify that TSO-Jumbo Frames are enabled where possible.

o Tasks represent system activities that do not complete immediately, such as migrating a VM.

o If you are logged in to a vCenter Server system that is part of a Connected Group, a column in the task list displays the name of the vCenter

Server system on which the task was performed.




ESX Configuration Guide

o A vNetwork Distributed Switch acts as a single vSwitch across all associated hosts on a datacenter. This allows virtual machines to maintain

consistent network configuration as they migrate across multiple hosts. A dvPort is a port on a vNetwork Distributed Switch.


to the VMkernel at the Ethernet level through virtual switches.

o TCP Segmentation Offload (TSO), allows a TCP/IP stack to emit very large frames (up to 64KB) even though the maximum transmission unit

(MTU) of the interface 220 701 is smaller. The network adapter then separates the large frame into MTU-sized frames and prepends an adjusted copy

of the initial TCP/IP headers.

o The default number of logical ports for a vSwitch is 56.

o Each uplink adapter associated with a vSwitch uses one port.

o You can create a maximum of 127 vSwitches on a single host. (EDIT the current Maximums PDF says 248)

o Maximum of 512 port groups on a single host.

o For a port group to reach port groups located on other VLANs, the VLAN ID must be set to 4095. If you enter 4095, the port group can see

traffic on any VLAN while leaving the VLAN tags intact.

o VLAN ID is a number between 1 and 4094.

o ESX supports only NFS version 3 over TCP/IP.

o You can create a maximum of 16 service console ports in ESX.

o CDP advertisements typically occur once a minute.

o dvPort group properties include:

o Port Binding - when ports are assigned to virtual machines connected to this dvPort group.

o Static binding - to assign a port to a virtual machine when the virtual machine is connected to the dvPort group.

o Dynamic binding - to assign a port to a virtual machine the first time the virtual machine powers on after it is connected to the

dvPort group.

o Ephemeral - for no port binding.

o Whether to allow live port moving.

o Config reset at disconnect to discard per-port configurations when a dvPort is disconnected from a virtual machine.

o Binding on host allowed to specify that when vCenter Server is down, ESX can assign a dvPort to a virtual machine.

o Port name format to provide a template for assigning names to the dvPorts in this group.

o Private VLANs are used to solve VLAN ID limitations.

o A private VLAN is identified by its primary VLAN ID. A primary VLAN ID can have multiple secondary VLAN IDs associated with it. Primary

VLANs are Promiscuous, so that ports on a private VLAN can communicate with ports configured as the primary VLAN. Ports on a secondary

VLAN can be either:

o Isolated - communicating only with promiscuous ports

o Community - communicating with both promiscuous ports and other ports on the same secondary VLAN.

o Only one VMotion and IP storage port gro... Read More

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www.certifyme.com Q:45 Which of the following files are part of a typical virtual machine (Choose Three)?

A. Virtual Machine Backup File (.vmbk)

B. Configuration File (.vmx)

C. Virtual Disk File (.vmdk)

D. VMotion Transfer File (.vmt)

E. Virtual Machine 640 802 Dumps  Snapshot Metadata File (.vmsd)

Answer: B, C, E

www.certifyme.com Q:46 Which of the following is a benefit of ESXi over ESX?

A. Improved Fault Isolation

B. Increased Security and Reliability

C. Dynamic Resource Allocation

D. Memory Overcommitment

Answer: B

www.certifyme.com Q:47 Which of the following are benefits of ESXi over ESX (Choose Two)?

A. RCLI support

B. Scripted Installation

C. Smaller Attack Surface

D. Less Code to Patch

Answer: C, D

www.certifyme.com Q:48 What are two reasons why a company would choose to use VMware ESXi instead of using VMware Server 2 (Choose Two)?

A. The company wants to be able to patch the servers hosting their virtual machines with zero virtual

machine downtime

B. The company is virtualizing several physical servers and wants a centralized management option

C. The company needs to access their virtual machines remotely and VMware Server 2 does not support a

remote console option

D. The company needs the 640-802  ; ability to run dual-processor virtual machines

Answer: A, B

www.certifyme.com Q:49 Networking policies, such as traffic shaping and security, can be configured on the following vSphere elements?

A. On the physical network interface and the vSwitch

B. On the port group and the physical network interface

C. On the port group and the vSwitch

D. On the vSwitch and the attached virtual machine

Answer: C

www.certifyme.com Q:50 The following connection types can all be configured on a single vSwitch?

A. VMkernel, virtual machine and no Service Console port groups

B. Service Console, virtual machine and VMkernel port groups

C. Service Console and 2 VMkernel port groups

D. Service Console and 2 virtual machine port groups

Answer: B

www.certifyme.com Q:51 640 802 braindumps An administrator needs to determine the current network adapter configuration for an uplink on an ESX Host. Which of the following items can be viewed from the Network Adapters section of the Configuration tab using the vSphere Client (Choose Three)?

A. Wake on LAN support

B. Speed and Duplex settings

C. Observed IP ranges

D. TCP Segmentation Offload (TSO) support

E. Jumbo Frame support

Answer: A, B, C

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o By default, statistics are stored in the vCenter Server database for one year. You can increase this to three years.

o You cannot view datastore metrics in the advanced charts. They are only available in the overview charts.

o CPU Performance Enhancement Advice

1. Verify that VMware Tools is installed on every VM on the host.

2. Compare the CPU usage vcp 4  value of a VM with the CPU usage of other VMs on the host or in the resource pool. The stacked bar chart on the

host's Virtual Machine view shows the CPU usage for all VMs on the host.

3. Determine whether the high ready time for the VM resulted from its CPU usage time reaching the CPU limit setting. If so, increase the

CPU limit on the VM.

4. Increase the CPU shares to give the VM more opportunities to run. The total ready time on the host might remain at the same level if the

host system is constrained by CPU. If the host ready time doesn't decrease, set the CPU reservations for high-priority VMs to guarantee

that they receive the required CPU cycles.

5. Increase the amount of memory allocated to the VM. This decreases disk and or network activity for applications that cache. This might

lower disk I/O and reduce the need for the ESX/ESXi host to virtualize the hardware. Virtual machines with smaller resource allocations

generally accumulate more CPU ready time.

6. Reduce the number of virtual CPUs on a VM to only the number required to execute the workload. For example, a single-threaded

application on a four-way VM only benefits from a single vCPU. But the hypervisor's maintenance of the three idle vCPUs takes CPU cycles

that could be used for other work.

7. If the host is not already in a DRS cluster, add it to one. If the host is in a DRS cluster, increase the number of hosts and migrate one or

more VMs onto the new host.

8. Upgrade the physical CPUs or cores on the host if necessary.

9. Use the newest version of ESX/ESXi, and enable CPU-saving features such as TCP Segmentation Offload, large memory pages, and jumbo

frames.

o Memory Performance Enhancement Advice

1. Verify that VMware Tools is installed on each VM. The balloon driver is installed with VMware Tools and is critical to performance.

2. Verify that the balloon driver is enabled. The VMkernel regularly reclaims unused VM memory by ballooning and swapping. Generally,

this does not impact VM performance.

3. Reduce the memory space on vmware vcp 4  the VM, and correct the cache size if it is too large. This frees up memory for other VMs.

4. If the memory reservation of the VM is set to a value much higher than its active memory, decrease the reservation setting so that the

VMkernel can reclaim the idle memory for other VMs on the host.

5. Migrate one or more VMs to a host in a DRS cluster.

6. Add physical memory to the host.

o Disk I/O Performance Enhancement Advice

1. Increase the VM memory. This should allow for more operating system caching, which can reduce I/O activity. Note that this may require

you to also increase the host memory. Increasing memory might reduce the need to store data because databases can utilize system

memory to cache data and avoid disk access. To verify that VMs have adequate memory, check swap statistics in the guest operating

system. Increase the guest memory, but not to an extent that leads to excessive host memory swapping. Install VMware Tools so that

memory ballooning can occur.

2. Defragment the file systems on all guests.


4. Use the vendor's array tools to determine the array performance statistics. When too many servers simultaneously access common

elements on an array, the disks might have trouble keeping up. Consider array-side improvements to increase throughput.

5. Use Storage VMotion to migrate I/O-intensive VMs across multiple ESX/ESXi hosts.

6. Balance the disk load across all physical resources available. Spread heavily used storage across LUNs that are accessed by different

adapters. Use separate queues for each adapter to improve disk efficiency.

7. Configure the HBAs and RAID controllers for optimal use. Verify that the queue depths and cache settings on the RAID controllers are

adequate. If not, increase the number of outstanding disk requests for the VM b... Read More

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