You are the network administrator for TestKing.com. The network consists of a
single Active Directory domain named testking.com and a single subnet. All servers
run Windows Server 2003. The network contains 150 client computers and 16
servers. Al computers on the network use the 10.10.0.0/16 address scheme.
Dr King, your manager, instructs you to place the 16 servers into a separate subnet
that uses the 192.168.10 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?

答案是不是255.255.255.248?

為什麼正確解答是255.255.255.224
答案錯了嗎