HOTSPOT
Your company has four offices. The offices are located in Montreal, Seattle, New York, and Miami.
Users access all of the web-based resources by using web proxy servers. The IP addresses
of the web proxies at each office are configured as shown in the following table.
The connections to the web proxies are balanced by using round-robin DNS.
The company plans to deploy a new application. The new application has a farm of front-end
web servers that connect to a back-end application server. When a session to a web server
is established, the web server stores data until the session closes. Once the session closes,
the data is sent to the application server.
You need to ensure that the incoming sessions to the web server farm are distributed among
the web servers. The solution must ensure that if a web server fails, the users are NOT
directed to the failed server.
How should you configure the port rule? To answer, select the appropriate options in the answer area.
Answer: 
Explanation:
the requirements are “incoming sessions to the web server farm are distributed among nodes”,
application assumption is “on the session closes, the data is send to application server”, a state data resides on the node.
constrain is all clients are connected to web server farm using site proxy servers.
Solution multiple hosts/network will bind users from 1 site to 1 node, no load distribution. If nlb cluster contains 3 hosts, one node will handle users from two sites. If nlb cluster contains more then 4 hosts, only 4 nodes will handle users.
Solution multiple hosts/single will bind all users using same site proxy to same node. But the suspended application session will be restored on the same node. According to me this is reasonable answer.
Solution multiple hosts/none is best from the load balancing point of view, but problematic from the application point of view.
Solution single host/* won’t distribute load among nodes till node is able to handle it.
https://technet.microsoft.com/en-us/library/bb687542.aspx
It should be correct Multiple host and Network.
Single
Multiple requests from the same client must access the same member; useful for clusters within an intranet.
Class C (Network)
Multiple requests from the same TCP/IP Class C address range must access the same member; useful for clusters on the Internet.
Answer seems correct
remember in multiple host mode –
•NLB automatically detects and remove the failure of NLB Node but it can’t judge whether an application is running or stopped working
The range 10.10.x.x doesn’t belong to class C. So is Network applicable?
Multiple host and network are the correct answers
Network Load Balancing Manager Properties > Port Rules section:
https://technet.microsoft.com/en-us/library/cc771709(v=ws.11).aspx
!!***The Affinity parameter is applicable only for the Multiple hosts filtering mode.***!!
Filtering mode:
“The Multiple hosts parameter specifies that multiple hosts in the cluster will handle network traffic for the associated port rule. This filtering mode provides scaled performance and fault tolerance by distributing the network load among multiple hosts. You can specify that the load be equally distributed among the hosts or that each host will handle a specified load weight.”