Level 5? Category 5?
What's the difference?
Level (n) applies to the physical wire only.
Category (n) applies to the cabling and termination infrastructure including Modular Inserts/Plugs, 110 Patch Panels, 66 Block and Data Patch Panels and so on.
The (5) in Cat 5 refers to the Level # of the wire: (Level 5)
Here's a table of transmission throughput supported by each Wiring Level: