This refers to base band signaling which is the type

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have the word base. This refers to base band signaling, which is the type of signaling used on Ethernet networks. After that, we have a dash followed by a letter. This letter defines the transmission medium. The T stands for twisted pair. More specifically, unshielded twisted pair. The T also specifies maximum cable length of 100 meters. If this were a CX the maximum cable length would be 25 meters. Now, if you were to see a different letter here, such as an L, LX, SX, etc. This would mean that the transmission medium is fiber optic cabling, not twisted pair cabling. As you can see, knowing how to decode the Ethernet specification naming is very useful. Let's look at another example: Here we have 10G base-SR, using what we just learned let's identifyinformation about the Ethernet standard. Notice the number has a G after it. This G stands for gigabit, and tells us that the transmission speeds are 10 gigabits per second. It uses a base band signal and the network transmission medium is SR, or short range fiber optic. Summary 4:05-4:24 So those are some of the components and characteristics of an Ethernet network. Remember Ethernet networks typically use unshielded twisted pair cabling. However, some use fiber optic cabling. Ethernet networks also use a switch to connect hosts, creating a star network topology. And Ethernet networks use a standard naming convention to identify transmission speeds and specifications. Ethernet is the most common local area networking standard for wired networks. The following table describes the various components that compose an Ethernet network: Component Description Network interface card A network interface card (NIC) creates the signals that are sent along the networking medium. A transceiver built into the network adapter formats the binary data for transmission on the network medium. Ethernet devices are identified using the MAC address, which is burned into the network interface card. Networking media Ethernet supports the following cable types: Unshielded twisted-pair cables (UTP) with RJ45 connectors. This is the most common transmission medium used for Ethernet. Fiber optic cables, which are used in high-speed applications (e.g., servers or streaming media). Coaxial cable with F-type connectors for cable Internet services. Coaxial cable is also used for older Ethernet implementations (often called thinnet or thicknet networks). Connectivity devices Ethernet uses the following connectivity devices. A hub provides a central connection for multiple media segments on the same subnet. When a hub receives a signal, it is repeated out to all other ports. Hubs operate in half-duplex mode, meaning devices can either send or receive data at any given time. Hubs are rarely used in networking environments and should be avoided if possible.
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