You are the network administrator. The network consists of a single Active Directory domain named demo.com and a single subnet. All servers run windows server 2012. The network contains 150 client computers and 16 servers. All computers on the network use the 10.10.0.0/16 address scheme.
Bill, your manager, instructs you to place the 16 server into a separate subnet that uses the 192.16810 public addressing scheme. You must plan for a maximum of 30 servers in the future. You need to configure a new subnet mask. The subnet mask must allow a sufficient number of IP addresses for the existing servers and future growth however, you want to conserve addresses as much as possible
which subnet mask should you use
Select one of the following: