You need to ensure that all new connections to App1 are directed to Server2

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 URL http://app1.contoso.com.
You plan to perform maintenance on Server1. You need to ensure that all new connections to App1
are directed to Server2.
The solution must not disconnect the existing connections to Server1.
What should you run?

A.
The Set-NlbCluster cmdlet

B.
The Set-NlbClusterNode cmdlet

C.
The Stop-NlbCluster cmdlet

D.
The Stop-NlbClusterNode cmdlet