Hotspot Question
Your network contains an Active Directory domain named contoso.com. The domain contains two
member servers named Server1 and Server2. All servers run Windows Server 2012 R2.
Server1 and Server2 have the Network Load Balancing (NLB) feature installed.
The servers are configured as nodes in an NLB cluster named Cluster1. Both servers connect to
the same switch. Cluster1 hosts a secure web application named WebApp1.
WebApp1 saves user state information in a central database.
You need to ensure that the connections to WebApp1 are distributed evenly between the nodes.
The solution must minimize port flooding.
What should you configure? To answer, configure the appropriate affinity and the appropriate mode
for Cluster1 in the answer area.
Answer: 
Explanation:
http://technet.microsoft.com/en-us/library/cc782694(v=ws.10).aspx
The first set of options are possibly wrong. It should be:
None
Single
Class C
That is according to this Technet article:
https://technet.microsoft.com/en-us/library/bb687542.aspx
Since the session information is stored in a centralized database, the affinity should be set to None. Affinity should be set to Single only if the individual server stores session information.
Agree. IGMP multicast removes switch flooding directing NLB traffic only for the nodes that participate in the NLB cluster.
https://technet.microsoft.com/en-us/library/cc731616.aspx
https://technet.microsoft.com/en-us/library/cc759039%28v=ws.10%29.aspx
Applications that retain user information can resolve the affinity requirement by using Network Load Balancing affinity or by using a common session state database or server. Applications that have a common session state database or server are combined with cookie-based affinity to allow any cluster host to restore the appropriate session state. If an application has a common session state database or server, you can select a port rule affinity of None if SSL is not part of the solution.
What the correct answer ?
single and multicast.
http: none
https: single
If an application has a common session state database or server, you can select a port rule affinity of None if SSL is not part of the solution.
since it’s a ‘secure’ web app it’s using SSL. Affinity would be single. Question might bee worded differently in the exam though