Add periods to alt text

Author: JamesJBarnett

articles/reliability/reliability-dns.md

@@ -50,7 +50,7 @@ This article focuses specifically on Azure DNS disaster recovery planning.
 
 The Azure DNS manual failover solution for disaster recovery uses the standard DNS mechanism to fail over to the backup site. The manual option via Azure DNS works best when used in conjunction with the cold standby or the pilot light approach.
 
-![Diagram of manual failover using Azure DNS](../networking/media/disaster-recovery-dns-traffic-manager/manual-failover-using-dns.png)
+![Diagram of manual failover using Azure DNS.](../networking/media/disaster-recovery-dns-traffic-manager/manual-failover-using-dns.png)
 
 *Figure - Manual failover using Azure DNS*
 
@@ -65,13 +65,13 @@ The assumptions made for the solution are:
 
 1. Create a DNS zone (for example, www\.contoso.com) as shown below:
 
-    ![Screenshot of creating a DNS zone in Azure](../networking/media/disaster-recovery-dns-traffic-manager/create-dns-zone.png)
+    ![Screenshot of creating a DNS zone in Azure.](../networking/media/disaster-recovery-dns-traffic-manager/create-dns-zone.png)
 
     *Figure - Create a DNS zone in Azure*
 
 1.  Within this zone, create three records (for example - www\.contoso.com, prod.contoso.com and dr.consoto.com) as show below.
 
-    ![Screenshot of creating DNS zone records](../networking/media/disaster-recovery-dns-traffic-manager/create-dns-zone-records.png)
+    ![Screenshot of creating DNS zone records.](../networking/media/disaster-recovery-dns-traffic-manager/create-dns-zone-records.png)
 
     *Figure - Create DNS zone records in Azure*
 
@@ -80,7 +80,7 @@ The assumptions made for the solution are:
 
 1. Once failure is detected, change the record value to point to dr.contoso.com as shown below:
 
-    ![Screenshot of updating CNAME record](../networking/media/disaster-recovery-dns-traffic-manager/update-cname-record.png)
+    ![Screenshot of updating CNAME record.](../networking/media/disaster-recovery-dns-traffic-manager/update-cname-record.png)
 
     *Figure - Update the CNAME record in Azure*
 
@@ -100,4 +100,4 @@ The assumptions made for the solution are:
 
 - [Reliability in Azure](/azure/reliability/availability-zones-overview)
 - Learn more about [Azure Traffic Manager](../traffic-manager/traffic-manager-overview.md).
-- Learn more about [Azure DNS](../dns/dns-overview.md).
+- Learn more about [Azure DNS](../dns/dns-overview.md).