VCP-410 Q&A – Configure ESX/ESXi Networking (11-20)

Section 2 – Configure ESX/ESXi Networking

• Objective 2.1 – Configure Virtual Switches

QUESTION 11
When configuring the vSwitch NIC teaming policy, what happens when the Notify Switches option is set to Yes?
A.The physical switch is notified when the location of a virtual NIC changes
B.The virtual switch is notified when the physical NIC link state changes
C.The virtual switch is notified when the location of a physical NIC changes
D.The physical switch is notified when the virtual NIC link state changes
Answer: A

Explanation:
Mastering VMware vSphere 4, page 176.
A vSwitch includes a Notify Switches configuration setting, which when set to Yes, will allow the physical switch to immediately learn of any of the following changes:
A NIC team failover of failback has occurred.
When a NIC team member fails, or fails back, the virtual NIC connected to the switch will change.

QUESTION 12
Which of the following two statements are true regarding vSphere virtual switch uplinks (Choose Two)?
A.vSphere virtual switches can be configured to use the same uplink
B.vSphere virtual switches do not need to be configured with an uplink
C.Multiple vSphere virtual switches cannot be configured to use the same uplink
D.vSphere virtual switches must be configured with at least one uplink
Answer: BC
Explanation:
VMware Virtual Networking Concepts, page 6.
Some virtual switches should not connect to a physical network and thus have no uplink port.
If you attempt to assign an uplink port, (previously assigned to a switch), to a second switch, the uplink will be disconnected from the first switch before being connected to the second.

QUESTION 13
The following connection types can all be configured on a single vSwitch?
A.Service Console and 2 VMkernel port groups
B.Service Console and 2 virtual machine port groups
C.Service Console, virtual machine and VMkernel port groups
D.VMkernel, virtual machine and no Service Console port groups
Answer: C
Explanation:
The screen shot below shows a vSwitch configured with Service Console, virtual machine and VMkernel port groups

QUESTION 14
The vSwitch or vSwitch port group policy setting that allows a virtual machine to transmit packets that contain a MAC address other than the address defined for the VM is?
A.Promiscuous Mode
B.Traffic Shaping
C.Forged Transmits
D.MAC Address Changes
Answer: C
Explanation:
Forged Transmits
Reject – Any outbound frame with a source MAC address that is different from the one currently set on the adapter will be dropped.
Accept – No filtering is performed and all outbound frames are passed.

QUESTION 15
When using the Explicit Failover option for a virtual switch with multiple uplinks, ESX determines the uplink to use in a failover event by?
A.using link state tracking to see which uplinks are connected
B.using beacon probing to discover which uplink has the shortest route
C.a specified list
D.using the reported uptime to determine which uplink to select
Answer: C
Explanation:
ESX Configuration Guide ESX 4.0 vCenter Server 4.0, page 43.
Use explicit failover order – Always use the highest order uplink from the list of Active adapters which passes failover detection criteria.

QUESTION 16
Which of the following describes the default behavior of uplinks added to a virtual switch?
A.Only one uplink can be attached to a virtual switch
B.The first uplink is active, additional uplinks are standby
C.The first uplink is active, additional uplinks are unused
D.All uplinks are active
Answer: D
Explanation:
When an uplink port is added, it defaults to the Active Adapters group, as below.

QUESTION 17
The incorrect application of traffic shaping settings can affect network performance of _____.
A.traffic only between virtual machines on the same vSwitch
B.traffic only between virtual machines on different vSwitches on the different ESX Servers
C.traffic only between virtual machines on different vSwitches on the same ESX Server
D.general network traffic, including non virtual machine traffic
Answer: D
Explanation:
Traffic shaping is more applicable to traffic restricted by WAN and LAN considerations than traffic traveling within an ESX host, (where bandwidth is typically much higher).
Therefore, traffic shaping policies can affect the entire physical and virtual network infrastructure.

QUESTION 18
What methodology does ESX Server use for the implementation of VLANs?
A.MAC-based policies
B.protocol-based policies
C.port group policies
D.bonds
Answer: C
Explanation:
vSphere 4: Multi VLAN trunking on a port group (VGT).
vSphere 4 allows a port group to be configured with multiple VLANs

QUESTION 19
Which of the following interfaces can be used to create virtual switches?
A.command line using vmware-cmd
B.Management User Interface
C.VI Client
D.VI Remote Console
Answer: C
Explanation:
Mastering Vmware vSphere, page 152
esxcfg-vswitch -a <VSwitch name> is the command used to create a new vSwitch, so A is incorrect.
Management User Interface and VI Remote Console are not valid options, so B and D is incorrect
The screenshot below shows the vSphere Virtual Infrastructure client being used to create a virtual switch, so C is correct.

QUESTION 20
Which is an important benefit provided by VLANs?
A.higher network availability
B.improved memory access
C.improved security
D.higher tolerance to broken physical hardware
Answer: C
Explanation:
Wikipedia Virtual LAN
VLANs are created to provide the segmentation services traditionally provided by routers in LAN configurations. VLANs address issues such as scalability, security, and network management.