Some f type connectors can be crimped or screwed onto

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Some F type connectors can be crimped or screwed onto the end of a cable but these types of connectors cause signal leakage. This is why the industry standard is to use compression F type connectors that are attached using a special compression tool. Another type of connector used by coaxial cables is called the Bayonet Neill-Concelman or simply BNC connector which is this connector here. This connector is used by very old networks and some specialized industries. Advantages and Disadvantages 3:44-4:13 The benefit to using coaxial cabling is that it's relatively resistant to both electromagnetic interference and physical damage. However, it's more expensive than other types of networking media, especially when run over long distances. In addition, coaxial cables oftentimes need to be connected to a splitter in order to connect to multiple devices. Doing so causes a small amount of signal loss. In fact, coaxial cables can only be connected to around three or four splitters before the signal loss is too great. Twisted Pair 4:14-4:43 The next type of cable we'll talk about is called twisted pair cabling. Twisted pair cabling is the most prolific network medium and the one you're going to work with the most. Standard twisted pair cabling is composed of eight copper wires that are twisted into four pairs,which look like this. The individual wires in twisted pair cabling are either 22 or 24-gauge copper wirethat is coated in plastic for insulation. Now the wires in twisted pair cabling are twisted into two pairs for a specific reason. EMI 4:44-5:29 See, when an electrical current passes through any kind of copper wire, an electromagnetic field is created around the wire. This is called electromagnetic interference or EMI. EMI emitted by the wires in a twisted pair cable can be absorbed by neighboring wires resulting in a shadow signal that affects communication. This effect is known as cross-talk. However, by twisting two cables together the electromagnetic fields generated by each wire cancels each other out and greatly reduces cross- talk. In fact, the tighter the wire pairs are twisted the more EMI is reduced. Now EMI can come from a lot of different sources, not just the cable's wires. Because of this, twisted pair cables come in two different types, UTP and STP. Shielded vs Unshielded 5:30-6:04 UTP stands for unshielded twisted pair. UTP cabling looks like this example here. The internal wires are encased in a plastic sheath and that's it. UTP cabling is cheap but does not protect against external EMI at all. As its name implies, STP cabling has additional shielding around the wire bundle to protect against EMI. Some STP cabling encases each wire pair and foil shielding to further protect against EMI. STP cabling is much more expensive than UTP cabling but is necessary in some situations.
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