Exam70-412 Chapter 1 - 9 QUESTIONS AND ANSWERS(SCORES 100%)
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Exam70-412 Chapter 1 - 9
Which of the following technologies transparently distributes traffic across multiple servers by using virtual IP addresses and a shared name? Correct Answer: Network Load Balancing
***Network Load Balancing (NLB) transparently distributes traffic across multiple ser...
exam70 412 chapter 1 9 questions and answersscores 100
which of the following technologies transparently distributes traffic across multiple servers by using virtual ip a
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Exam70-412 Chapter 1 - 9
Which of the following technologies transparently distributes traffic across multiple servers by using
virtual IP addresses and a shared name? Correct Answer: Network Load Balancing
***Network Load Balancing (NLB) transparently distributes traffic across multiple servers by using
virtual IP addresses and a shared name. With NLB, you gain fault tolerance and enhanced performance.
It is often used with mission-critical web servers but can also be found with other types of servers.
Which of the following statements about Network Load Balancing is incorrect? Correct Answer:
Network adapters in the NLB cluster can use both multicast and unicast simultaneously.
***Within each cluster, all network adapters must be either multicast or unicast. You cannot have some
nodes configured as multicast while other nodes are configured as unicast within a single cluster.
From where would you add Network Load Balancing to a Windows Server 2012 computer? Correct
Answer: Server Manager
***To add the NLB feature to a computer running Windows Server 2012, you use Server Manager.
To configure an NLB cluster after installing NLB on the Windows Server 2012 computer, you must
configure three types of parameters. Which of the following is not one of the three you must configure?
Correct Answer: Firewall rules
***To configure the NLB cluster, you must configure three types of parameters:
- Host parameter: Defines what each node can do in an NLB cluster.
- Cluster parameter: Configures the NLB cluster as a whole.
- Port rules: Controls what ports the NLB cluster services and how requests are balanced across all
servers.
Which PowerShell cmdlet here will correctly install NLB and the NLB management console? Correct
Answer: Add-WindowsFeature NLB,RSAT-NLB
***To install the NLB cluster and the NLB tools using PowerShell, you can use the following cmdlet: Add-
WindowsFeature NLB,RSAT-NLB
Which PowerShell cmdlet is used to add a new dedicated IP to an NLB cluster node? Correct Answer:
Add-NlbClusterNodeDip
***You can use the Add-NlbClusterNodeDip cmdlet to add a dedicated IP to an NLB cluster node.
Which PowerShell cmdlet is used to delete an NLB cluster? Correct Answer: Remove-NlbCluster
***You can use the Remove-NlbCluster cmdlet to delete a specified NLB cluster.
,While logged into a Windows Server 2012 computer that is part of an NLB cluster, which of the following
PowerShell one-liners is the correct way to change or set the primary IP address of the cluster? Correct
Answer: Get-NlbCluster | Set-NlbCluster -ClusterPrimaryIP IPaddress
***You would need to use the Get-NlbCluster | Set-NlbCluster -ClusterPrimaryIP IPaddress PowerShell
one-liner to change or set the primary IP address of the cluster.
When you configure port rules for NLB clusters, you will need to configure all of the options listed here,
except for one. Which option in this list will you not configure for a port rule? Correct Answer: The node
IP address the rule should apply to
***When you configure the port rules, you configure the following:
- The virtual IP address that the rule should apply to
- The TCP or UDP port range that this rule should apply to
- The protocols that this rule should apply to, including TCP, UDP, or both
- The filtering mode that specifies how the cluster handles traffic, which is described by the port range
and the protocols
In which NLB cluster operation mode is the MAC address of every node's network adapter replaced with
a single shared MAC address? Correct Answer: Unicast
***When you configure an NLB cluster to use unicast mode, NLB replaces the network card's original
MAC address, and all cluster hosts use the same unicast MAC address.
Which of the following is a constraint of using NLB clusters in unicast mode that you will need to design
for? Correct Answer: You will need separate cluster and management network adapters if you manage
the nodes from a different TCP/IP subnet than the cluster network.
***When you use unicast mode with a single network adapter on each node, the computer can
communicate only with other computers within the same subnet. If you perform management tasks on
the computer, you need to perform these tasks on a computer that is on the same TCP/IP subnet as the
node, or you have to use a second network adapter and address.
Which cluster operation mode is designed to prevent the network switch from flooding with traffic?
Correct Answer: IGMP Multicast
***Another mode available is the Internet Group Management Protocol Multicast mode, which is a
special form of multicast mode that prevents the network switch from flooding with traffic. When you
use IGMP multicast mode, traffic is forwarded only through the switch ports that are part of the NLB
cluster.
Which NLB control command would be the correct one to use to gracefully prepare a node for a planned
maintenance activity? Correct Answer: Drainstop
***To perform maintenance on an NLB node that needs to be temporarily removed from the NLB
cluster, you should choose drainstop so that connections are not prematurely stopped before the
requests are completed.
, Which NLB control command would most likely be the best option to use to immediately prepare a node
for emergency maintenance? Correct Answer: Stop
***The stop action terminates all existing connections to the cluster node and stops the NLB service.
This would most likely be the best option if you needed to immediately take the server out of the NLB
cluster for maintenance; although, it will result in client session interruption, so it should be used with
caution and an understanding of the net result.
Many components can be configured redundantly within a server system. Of the components listed,
which one is typically not available in a redundant arrangement in a single server system? Correct
Answer: Mainboards (motherboards)
***To make a server more fault tolerant, you should first look at what components are the most likely
to fail and implement technology to make the system less likely to fail. Some of the components that are
made redundant within a system are usually the following:
- Disks: Use some form of RAID and hot spares.
- Power supplies: Use redundant power supplies.
- Network cards: Use redundant network cards.
Why should you clearly express availability requirements? Correct Answer: To ensure there are no
misunderstandings
***If there is miscommunication about service-level expectations between the customer and the IT
department, poor business decisions, unsuitable investment levels, and customer dissatisfaction are
likely to occur. Therefore, you need to express availability requirements clearly so that there are no
misunderstandings about the implications.
What is the function of port rules in an NLB cluster? Correct Answer: They define which ports are
balanced among the hosts of the cluster
***Port rules define which incoming TCP/IP requests are balanced among the hosts in the NLB cluster.
When configuring a port rule for an NLB cluster with the "multiple host" filtering mode selected, which
of the following statements is most correct pertaining to the affinity configuration? Correct Answer:
Selecting the "Single" option will force a single cluster node to handle all client requests from a specific
client
***When you select the "Single" affinity option, a single cluster node handles all requests from a single
client. This option is useful for stateful applications where the status of a process or transaction is
maintained through the entire connection, including when using SSL and e-commerce shopping cart
applications.
Which of the following availability guidelines allows for a maximum downtime per month of 25.9
seconds? Correct Answer: Five nines (99.999%)
***The maximum allowable downtime for each "9" of availability is:
- 99%—3.65 days per year, or 7.20 hours per month
- 99.9% ("three nines")—8.76 hours per year, or 43.8 minutes per month
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