HOTSPOT
Your network contains two Web servers named Server1 and Server2. Both servers run Windows
Server 2012 R2.
Server1 and Server2 are nodes in a Network Load Balancing (NLB) cluster. The NLB cluster contains
an application named App1 that is accessed by using the name appl.contoso.com.
The NLB cluster has the port rules configured as shown in the exhibit. (Click the Exhibit button.)
To answer, complete each statement according to the information presented in the exhibit. Each
correct selection is worth one point.
Answer: 
Explanation:
* Port 80 is in Single mode.
* An HTTP session is a sequence of network request-response transactions. An HTTP client initiates a
request by establishing a Transmission Control Protocol (TCP) connection to a particular port on a
server (typically port 80, occasionally port 8080.
https://technet.microsoft.com/en-us/library/cc778263(v=ws.10).aspx
Multiple hosts. This parameter specifies that multiple hosts in the cluster handle network traffic for the associated port rule. This filtering mode provides scaled performance in addition to 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 handle a specified load weight.
• Single host. This parameter specifies that network traffic for the associated port rule be handled by a single host in the cluster according to the specified handling priority. This filtering mode provides port specific fault tolerance for the handling of network traffic.
• Disable this port range. This parameter specifies that all network traffic for the associated port rule be blocked. In this case, the Network Load Balancing driver filters all corresponding network packets or datagrams. This filtering mode lets you block network traffic addressed to a specific range of ports.
0
0
also from the above link
By default, all cluster network traffic not governed by port rules is handled by the host with the highest host priority among the current members of the cluster. This single host handles all of the cluster network traffic, with another host taking over the traffic in the event that the highest priority host fails or goes offline. This default behavior ensures that Network Load Balancing does not affect cluster network traffic for ports that you do not specifically manage with the Network Load Balancing load-balancing mechanisms. It also provides high availability in the handling of your cluster network traffic
0
0
If one single node fails in the cluster, while a client has made a connection through port 80 to that node, I would think that only the connection would fail/terminate and the client would just have to establish a new connection to the cluster and would then be directed to a node in the cluster that has not failed.
These port rules apply to every IP/node in the cluster, so if one node in the cluster fails (one IP address is not available) a connection is made to a IP address that has not failed.
So IMO this App1 application is still available, just through other nodes in the cluster.
Single host mode will send all traffic for that port rule to the server with the highest priority value. If one server is down, the next highest priority server takes up the role of Single host for that rule
answer is correct
0
0