Exam70-412 Ch01

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?

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 of the following availability guidelines allows for a maximum downtime per month of 25.9 seconds?

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 - 99.99% ("four nines")—52.6 minutes per year, or 4.32 minutes per month - 99.999% ("five nines")—5.26 minutes per year, or 25.9 seconds per month - 99.9999% ("six nines")—31.5 seconds per year, or 2.59 seconds per month

From where would you add Network Load Balancing to a Windows Server 2012 computer?

Server Manager ***To add the NLB feature to a computer running Windows Server 2012, you use Server Manager.

Which NLB control command would most likely be the best option to use to immediately prepare a node for emergency maintenance?

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.

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?

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 PowerShell cmdlet is used to delete an NLB cluster?

Remove-NlbCluster ***You can use the Remove-NlbCluster cmdlet to delete a specified NLB cluster.

Which PowerShell cmdlet is used to add a new dedicated IP to an NLB cluster node?

Add-NlbClusterNodeDip ***You can use the Add-NlbClusterNodeDip cmdlet to add a dedicated IP to an NLB cluster node.

Which PowerShell cmdlet here will correctly install NLB and the NLB management console?

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 NLB control command would be the correct one to use to gracefully prepare a node for a planned maintenance activity?

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 of the following availability guidelines allows for a maximum downtime per year of 52.6 minutes?

Four nines (99.99%) ***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 - 99.99% ("four nines")—52.6 minutes per year, or 4.32 minutes per month - 99.999% ("five nines")—5.26 minutes per year, or 25.9 seconds per month - 99.9999% ("six nines")—31.5 seconds per year, or 2.59 seconds per month

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?

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.

Which cluster operation mode is designed to prevent the network switch from flooding with traffic?

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.

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?

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.

Which of the following technologies transparently distributes traffic across multiple servers by using virtual IP addresses and a shared name?

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?

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.

Which of the following availability guidelines allows for a maximum downtime per year of 31.5 seconds?

Six nines (99.9999%) ***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 - 99.99% ("four nines")—52.6 minutes per year, or 4.32 minutes per month - 99.999% ("five nines")—5.26 minutes per year, or 25.9 seconds per month - 99.9999% ("six nines")—31.5 seconds per year, or 2.59 seconds per month

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?

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

What is the function of port rules in an NLB cluster?

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.

Which of the following availability guidelines allows for a maximum downtime per month of 43.8 minutes?

Three nines (99.9%) ***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 - 99.99% ("four nines")—52.6 minutes per year, or 4.32 minutes per month - 99.999% ("five nines")—5.26 minutes per year, or 25.9 seconds per month - 99.9999% ("six nines")—31.5 seconds per year, or 2.59 seconds per month

Why should you clearly express availability requirements?

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.

In which NLB cluster operation mode is the MAC address of every node's network adapter replaced with a single shared MAC address?

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?

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.