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Cisco Fabric Extender (FEX)Technology delivers an extensible and a scalable fabric that provides a flexible and comprehensive solution as part of Cisco Unified Fabric.FEX Technology: Cisco Nexus 2000 Series Fabric Extenders (FEX) : Extends the fabric to top-of-the-rack (TOR). 2  Cisco UCS 2200 Series Fabric Extenders: Extends the fabric to the Cisco UCS Blade Chassis. 3  Cisco Adapter Fabric Extender (Adapter FEX) : Extends the fabric into the server.
Doublesex (dsx) is a gene that is involved in the sex determination system of the fruit fly Drosophila melanogaster. The gene is expressed in both male and female flies and is subject to alternative splicing, producing the protein isoforms dsxf in females and the longer dsxm in males.