You have an Exchange Server 2013 organization that has two sites. The sites use a single namespace.
Each site contains two Exchange servers and a hardware load balancer. Mailboxes are distributed
evenly between the sites.
Your company’s IT policy states that all users must be able to access their mailbox if one site fails.
You implement a DNS round robin solution for the Client Access server infrastructure.
When a site outage occurs, some users report experiencing intermittent slowness when they
connect to their mailbox.
You need to recommend a solution to resolve the issue.
What are two possible recommendations to achieve this goal? Each correct answer presents a
complete solution.
A.
Remove the Virtual IP (VIP) of the failed data center.
B.
Implement geo-dns
C.
Add one additional Client Access server to each site.
D.
Deploy a Windows Failover Cluster in each site.
E.
Lower the TTL of the DNS records.
When a site outage occurs, some users report experiencing intermittent slowness when they connect to their mailbox. —-> DNS round robin load balancing – Multiple record caching. The problem with DNS round robin is that servers that are not responding correctly at the application layer (even though they are responding to ping etc. at the TCP layer) will still be connected to the client.
Depending on the period for which the component might be offline, you can remove the affected VIP from DNS to prevent clients from attempting to use it. When everything is fixed, you can then add the VIP back into DNS, and clients will begin to connect and use it again.
Microsoft Exchange Server 2013 Inside Out -Mailbox and High Availability
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