HOTSPOT
Your network contains an Active Directory domain named contoso.com. The domain contains a Network
Load Balancing (NLB) cluster named Cluster1 that contains four nodes. Cluster1 hosts a web application
named App1. The session state information of App1 is stored in a Microsoft SQL Server 2012 database.
The network contains four subnets.
You discover that all of the users from a subnet named Subnet1 always connect to the same NLB node.
You need to ensure that all of the users from each of the subnets connect equally across all of the nodes
in Cluster1.
What should you modify from the port settings?
To answer, select the appropriate setting in the answer area.
Answer: 
https://technet.microsoft.com/en-us/library/cc771709(v=ws.11).aspx
The Network option specifies that NLB direct multiple requests from the same TCP/IP Class C address range to the same cluster host. Enabling Network affinity instead of Single affinity ensures that clients that use multiple proxy servers to access the cluster have their TCP connections directed to the same cluster host.
The None option specifies that multiple connections from the same client IP address can be handled by different cluster hosts (there is no client affinity). To allow Network Load Balancing to properly handle IP fragments, you should avoid using None when selecting UDP or Both for your protocol setting.
Shouldn’t be None? I am right?
I think you are correct, so the only option is to set Affinity to Single