###BeginCaseStudy###
Case Study: 4
A)
Datum Corporation
Overview
A)
Datum Corporation is an airline catering company that has 8,000 users. A. Datum has three main
offices. The offices are located in Detroit, Chicago, and New York.
Existing Environment
Active Directory Environment
The network contains an Active Directory forest named adatum.com. The forest contains a single
domain. All domain controllers run Windows Server 2012.
Each main office contains two domain controllers. Each office is configured as an Active Directory
site.
The functional level of the forest is Windows Server 2012.
Network Infrastructure
The offices connect to each other by using a dedicated WAN link. Only the office in New York and
the office in Detroit connect directly to the Internet. Each office has a firewall.
The public DNS records for A. Datum are configured as shown in the following table.
The external interface for the firewall in the New York office is configured to use an IP address of
131.107.1.200 and to pass inbound traffic on port 25 and port 443 to EX2.
The external interface for the firewall in the Detroit office is configured to use an IP address of
131.107.2.200 and to pass inbound traffic on port 443 to EX4.
The Active Directory site is configured as shown in the Sites exhibit. (Click the Exhibit button.)
Exchange Server Organization
A)
Datum has an Exchange Server 2013 organization that contains two servers. The servers are
configured as shown in the following table.
Each server contains 15 mailbox databases.
Users use the name mail.adatum.com to connect to their mailbox from the Internet. The users use
the FQDN of the servers to connect from the internal network.
AM of the users in the Detroit office have a mailbox hosted on EX2.
The default email address policy contains a single email address format of @adatum.com.
A separate Send connector exists for the Chicago office and the New York office. The local servers in
each office are the only source servers in each Send connector.
The New York office is configured as a hub site. Antimalware filtering is disabled on EX1 and EX2.
Problem Statements
A)
Datum identifies the following issues:
• Users in the Detroit office report that sometimes, Microsoft Outlook takes a long time to
open.
• During a recent storage failure, administrators failed to restore the latest backup and lost all
of the email messages from the previous 48 hours.
• Users report that the email messages sent to some Internet domains are not received. Users
in the Chicago office report that some of their email messages generate a non-delivery
report (NDR).
• The help desk in the New York office reports that its most common Exchange-related task is
to restore email messages that were deleted by users more than 14 days ago. The task
requires time-consuming restore operations by the help desk.
Requirements
Business Requirements
A)
Datum wants to provide users with the ability to access their email from Internet Explorer 10,
even when the users are disconnected from the network. This ability must only be available if the
users log on to Outlook Web Access by using the Private option.
Planned Changes
You plan to deploy three additional Exchange Server 2013 servers. The servers will be configured as
shown in the following table.
After the planned deployment, all of the mailboxes of the Detroit office users will be moved to EX3.
All of the Detroit office users will use the name detroitmail.adatum.com when they connect from the
Internet and the name ex4.adatum.com when they connect from the internal network.
Technical Requirements
A)
Datum identifies the following technical requirements:
• All existing and future mailboxes must be limited to 5 GB of storage.
• Antimalware and anti-spam filtering must be enabled for the entire Exchange Server
organization.
• If storage for the mailbox database fails, administrators must be able to recover email
messages handled by transport services for to the last five days.
• Only the members of a group named Executives must be able to schedule meetings in a
room mailbox named Boardroom. Meeting requests must not be moderated.
• All of the servers in the New York office that have the Client Access server role installed must
be accessed by using a load balancing solution that can mark a server as down if a specific
URL on the server is unavailable.
Mailbox Creation Requirements
A)
Datum identifies the following requirements for creating new mailboxes:
• All mailboxes must automatically have single item recovery enabled.
• All mailboxes must automatically have the Exchange ActiveSync feature disabled.
###EndCaseStudy###
You need to recommend a solution for the New York office that meets the technical requirements
for client access.
What should you include in the recommendation? (Each correct answer presents a complete
solution. Choose all that apply.)
A.
DNS round robin
B.
a Layer 4 hardware load balancer
C.
a Layer 7 hardware load balancer
D.
the Network Load Balancing (NLB) feature
E.
a Client Access server array
I don’t think E is part of the correct answer. There are no CAS Arrays anymore in Exchange 2013:
In Exchange 2010, we introduced the concept of a Client Access array. After a Client Access array was configured for an Active Directory site, all Client Access servers in the site automatically became members of the array. In current builds of Exchange 2013, no configuration of a Client Access array is required, because the deployment of a load balanced and highly available service is much simpler.
A Not correct as you can’t drill down to URL level
B Is correct if you used Multiple namespaces
C is correct as you are using a Layer 7 HLB, therefore single namespace is suffice
D Not correct: WNLB only detects server outages by IP address.
E Not correct: there is no CAS array in Exchange 2013
Therefore I would choose B&C
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No CAS Array in 2013 answer is C. Layer 4 is servers sharing 1 IP
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Correct: B and C
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I think this is correct due to process of elimination…
Has to be C as you need it to identify if a URL is down, this is what a layer 7 load balancer does.
Therefore it can’t be B as you would use 1 or the other.
D is only required with layer 4 load balancing as layer 7 uses separate hardware.
A would not do what we need it to.
So the only leftover answer is E, which I don’t think is right as it is an old feature from 2010.
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The question says “Each correct answer presents a complete
solution. Choose all that apply”.
So you can perfectly chose B and C!
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I believe correct answer would be B and C : both of these load balancer types are able to prevent access to a SERVER if a specific url on this server is unreachable.
Layer 7 load balancer can also prevent access to a specific SERVICE if a specific url is unreachable.
Source : http://blogs.technet.com/b/exchange/archive/2014/03/05/load-balancing-in-exchange-2013.aspx
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The answer is B and C. Like Picyolo says the questions says both options present a complete solution.
Both Layer 4 and Layer 7 can mark a server as down if a url is not responsive respectively. DNS round robin cannot, and CAS is not part of 2013.
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Correct answer is
B.)a Layer 4 hardware load balancer
C.)a Layer 7 hardware load balancer
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