text: **2.5.1 Hosts**
  
  A host system is a server that is connected to IBM Storwize V7000 through a Fibre Channel 
  connection, Fibre Channel over Ethernet (FCoE), or through an internet SCSI (iSCSI) 
  connection. 
  
  Hosts are defined to IBM Spectrum Virtualize by identifying their worldwide port names 
  (WWPNs) for Fibre Channel hosts. For iSCSI hosts, they are identified by using their iSCSI 
  names. The iSCSI names can be iSCSI qualified names (IQNs) or extended unique identifiers 
  (EUIs). 
  
  **2.5.2 Host cluster**
  
  Host cluster is a host object in the IBM Storwize V7000. A host cluster is a combination of two 
  or more servers that is connected to IBM Storwize V7000 through a Fibre Channel, FCoE, or 
  iSCSI connection. Host cluster object can see the same set of volumes. 
  
  **2.5.3 Nodes or canisters**
  
  An IBM Storwize V7000 can have 2 - 8 hardware components, called*nodes*,*node canisters*, 
  or*canisters*. They perform the virtualization of internal and external volumes and the cache 
  and copy services (remote copy) functions. A clustered system consists of 1 - 4 node pairs. 