IBM E16RMLL-I Implementation Guide - Page 786
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Subagent A software component of SAN products that provides the actual remote query and control function, such as gathering host information and communicating with other components. This component is platform dependent. See also SAN agent. Subsystem masking The support provided by intelligent disk storage subsystems like the Enterprise Storage Server. See also LUN masking and port zoning. Switch A component with multiple entry and exit points or ports that provide dynamic connection between any two of these points. Switch topology A switch allows multiple concurrent connections between nodes. There can be two types of switches, circuit switches and frame switches. Circuit switches establish a dedicated connection between two nodes. Frame switches route frames between nodes and establish the connection only when needed. A switch can handle all protocols. W WAN Wide Area Network. Z Zoning In Fibre Channel environments, zoning allows for finer segmentation of the switched fabric. Zoning can be used to instigate a barrier between different environments. Ports that are members of a zone can communicate with each other but are isolated from ports in other zones. Zoning can be implemented in two ways: hardware zoning and software zoning. T TCP See Transmission Control Protocol. TCP/IP Transmission Control Protocol/Internet Protocol. Topology An interconnection scheme that allows multiple Fibre Channel ports to communicate. For example, point-to-point, arbitrated loop, and switched fabric are all Fibre Channel topologies. Transmission Control Protocol (TCP) A reliable, full duplex, connection-oriented, end-to-end transport protocol running on IP. Other glossaries For more information about IBM terminology, see the IBM Storage Glossary of Terms at: http://www.storage.ibm.com/glossary.htm For more information about Tivoli terminology, see the Tivoli Glossary at: http://publib.boulder.ibm.com/tividd/glossary /termsmst04.htm 756 IBM Tivoli Storage Manager Implementation Guide
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