1.1 To manage resources in an organisational network, IT administrators use Microsoft Windows Server concepts such as domain, groups, Active Directory, resource management and NTFS permissions. a. List and describe four security and distribution groups, classes in Windows Server 2016. (8 Marks) b. Active Directory allows administrators to manage permissions and access to network resources. Identify three active directory structures. (3 Marks) 1.2 As an IT administrator, you are in charge of procurement. Identify four criteria you will consider in choosing a central processing unit. (6 Marks) 1.3 The Open Systems Interconnection (OSI) model is a mechanism that enables communication across the network. Identify three OSI layers that deal with communications between network devices. (3 Marks)