Novell ZENworks Network Access Control introduces clusters and servers. A cluster is a logical grouping of one or more ESs that are managed by one MS.
A single-server installation is one where the MS and ES are on one server. The ES is assigned to a Default cluster. This configuration is illustrated in Figure 2-1.
A multiple-server installation is one where the MS is on one server and there are one or more ESs on separate servers. Each ES must be assigned to a cluster. This configuration is illustrated in Figure 2-2.
The responsibilities of the MS and ES are as follows:
MS
Configuration
NAC policies
Quarantining
Endpoint activity
License
Test updates
ES
Testing
Access control
The quarantine method is defined per cluster; all of the ESs in a given cluster use the same quarantine method (Inline, DHCP, or 802.1X). When using multiple clusters, each cluster can have a different quarantine method. Clusters cooperate to test and control access to the network, although the ESs in each cluster are not able to communicate with any ES in any other cluster.
The following sections contain more information: