You support a customer whose network environment includes Microsoft Lync Server 2013
Enterprise, with two Front End Servers and two Back End Servers. The Back End Servers are deployed
in a high availability configuration. You create a Front End pool named pool.contoso.com and
implement DNS load balancing for client access to the Lync servers. Your internal DNS records have
the following configuration:
_gc._tcp.contoso.com SRV priority 0, weight 100, port 3268 dc1.contoso.com_ldap._tcp.contos.com
SRV priority 0, weight 100, port 389 dc1.contoso.com_kerberos._tcp.contos.com SRV priority 0,
weight 100, port 88 dc1.contoso.com_sip._tls.contoso.com SRV priority 0, weight 0, port 5061,
pool.contoso.com FrontEndServer1 A 192.168.1.10FrontEndServer2 A 192.168.1.11BackEndServer1
A 192.168.1.20BackEndServer2 A 192.168.1.21Pool01
A
192.168.1.10Pool01
A
192.168.1.11 Your Lync 2013 clients fail to sign in automatically. The trace log of failed sign-in
attempt is as follows: INFO
:: QueryDNSSrv – DNS Name[_sipinternaltls._tcp.contoso.com]ERROR :: HRESULT failed: 80072726 =
HRESULT_FROM_WIN32(::ShimWSAGetLastError()) . Failed to convert string IP to SOCKADDRERROR
:: ResolveHostNameUsingGetAddrInfo – getaddrinfo(pool.contoso.com) failed WARN
:: ResolveHostName – getaddrinfo failed for pool.contoso.com ERROR ::
ResolveHostNameUsingDnsQuery – DnsQuery(pool.contoso.com) failed WARN
:: ResolveHostName – DNS lookup failed for pool.contoso.com ERROR :: ResolveHostName – Name
resolution for pool.contoso.com failedERROR :: ResolveHostSyncResolveHostName failed ERROR ::
GetDnsResults – did not get any resultERROR :: QueryDNSSrvGetDnsResults query:
_sipinternaltls._tcp.contoso.com failed ERROR ::
DNS_RESOLUTION_WORKITEM::ProcessWorkItemResolveHostName failed
You need to ensure that internal Lync 2013 clients can sign in automatically. You also need to ensure
that internal traffic is load balanced across the two Front End Servers. What should you do?
A.
Create the following host records:PoolA192.168.1.20PoolA192.168.1.21
B.
Create the following host records: PoolA192.168.1.10PoolA192.168.1.11
C.
Create the following service record: _sip._tls.contoso.com SRVPriority 0, weight 0, port 5061,
pool01.contoso.com
D.
Create the following host records: SipA 192.168.1.20SipA 192.168.1.21
E.
Create the following service record: _sipinternal._tls.contoso.com SRVPriority 0, weight 0, port
5061, FrontEndServer1.contoso.com