Final answer:
d) Telnet Server, which is not offered as a role in Windows Server 2012. Active Directory Domain Services, DHCP Server, and FTP Server are available roles, but FTP is part of IIS.
Step-by-step explanation:
The correct answer is option d) Telnet Server. Windows Server 2012 offers a range of server roles, which are sets of software programs that enable specific server functions. Active Directory Domain Services (AD DS) provides a distributed database that stores and manages information about network resources and application-specific data from directory-enabled applications.
DHCP Server is used for dynamic IP address allocation to the devices on a network. FTP Server is a service that is not included as a distinct role in Windows Server 2012, but it can be added as a feature under the IIS (Internet Information Services) role. Telnet Server, however, is not offered as a role or feature in Windows Server 2012, as it is considered insecure and has generally been replaced by more secure alternatives like SSH.