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Rj45 Categories & Network Types for Wired Ethernet Just because the wires look alike doesn't mean they are the same. This lesson introduces you to the various types of cabling designations such as Cat3 or Cat 6, and examines why they are different and how that applies to their use and installation. For example, Cat3, Cat5 and Cat 6 cables transmit data differently both in terms of speed, distance, and packaging, so we diagram this configuration to explain how it works. So not only will you learn what each Rj45 cable category is configured to do, where you would use/install Cat 5 over a Cat6, you understand how each will transfer data, what type of data can be transferred, and how far that data can be transferred. Then we'll explain what device types they pair up with and what telecommunications transfer mode is required to perform their data transfer function and the network type where you would use each one.