The network contains 100 client computers and 50 IP phones. The computers and the phones are from the same vendor. You create an IPv4 scope that contains addresses from 172.16.0.1 to 172.16.1.254. You need to ensure that the IP phones receive IP addresses in the range of 172.16.1.100 to 172.16.1.200. The solution must minimize administrative effort. What should you create?