They are used both in residential and commercial applications when a wired network is desired for data sharing and access to the internet. Most often an internet router uses ethernet cables in order to connect to a cable modem and will come with the kit your cable company sends you when you first sign up for services.
So, what do the different colors mean for ethernet cables? Are different colors faster than others? Like all cables, ethernet cables can come in several different colors.
The most common colors seen with ethernet cables are grey, blue, yellow, orange, and white. If the ethernet cable is destined to be outside, it will often be black and waterproof to help it survive longer in the elements. For example, with the Department of Defense DoD , the government uses different colors of ethernet cords in order to assign a given level of classification for the data being transmitted within the cable e.
Again, while there is no direct industry standard for one color over another, there are a few consistencies worth mentioning:. Until universal adoption takes place, there will most likely be many different colors used in ethernet cable colors.
With patch cable color standards, the University of Wisconsin Network Services Department is leading the way through example by helping to define what colors are to be used for every cable system on their campus. Depending on the client and the application patch cable colors can vary.
TB has surpassed A and is seen as the default wiring scheme for twisted pair structured cabling. If you are unsure of which to use, choose B. A straight through cable is a type of twisted pair cable that is used in local area networks to connect a computer to a network hub such as a router. This type of cable is also sometimes called a patch cable and is an alternative to wireless connections where one or more computers access a router through a wireless signal.
On a straight through cable, the wired pins match. Straight through cable use one wiring standard: both ends use TA wiring standard or both ends use TB wiring standard. The following figure shows a straight through cable of which both ends are wired as the TB standard. What Is Crossover Cable? A crossover Ethernet cable is a type of Ethernet cable used to connect computing devices together directly.
It has also made it the standard for connecting networks between buildings, due to its immunity to the effects of moisture and lighting.
Fiber optic cable has the ability to transmit signals over much longer distances than coaxial and twisted pair. It also has the capability to carry information at vastly greater speeds. This capacity broadens communication possibilities to include services such as video conferencing and interactive services.
The cost of fiber optic cabling is comparable to copper cabling; however, it is more difficult to install and modify. The center core of fiber cables is made from glass or plastic fibers see fig 5. A plastic coating then cushions the fiber center, and kevlar fibers help to strengthen the cables and prevent breakage. The outer insulating jacket made of teflon or PVC.
There are two common types of fiber cables -- single mode and multimode. Multimode cable has a larger diameter; however, both cables provide high bandwidth at high speeds. Single mode can provide more distance, but it is more expensive. More and more networks are operating without cables, in the wireless mode. Wireless LANs use high frequency radio signals, infrared light beams, or lasers to communicate between the workstations, servers, or hubs. Information is relayed between transceivers as if they were physically connected.
For longer distance, wireless communications can also take place through cellular telephone technology, microwave transmission, or by satellite. Wireless networks are great for allowing laptop computers, portable devices, or remote computers to connect to the LAN. Wireless networks are also beneficial in older buildings where it may be difficult or impossible to install cables. The two most common types of infrared communications used in schools are line-of-sight and scattered broadcast.
Line-of-sight communication means that there must be an unblocked direct line between the workstation and the transceiver. If a person walks within the line-of-sight while there is a transmission, the information would need to be sent again. This kind of obstruction can slow down the wireless network.
Scattered infrared communication is a broadcast of infrared transmissions sent out in multiple directions that bounces off walls and ceilings until it eventually hits the receiver.
Networking communications with laser are virtually the same as line-of-sight infrared networks. The Wi-Fi Alliance is a global, non-profit organization that helps to ensure standards and interoperability for wireless networks, and wireless networks are often referred to as WiFi Wireless Fidelity.
Since then many variations have emerged and will continue to emerge. Wi-Fi networks use the Ethernet protocol. Wireless networks are much more susceptible to unauthorized use than cabled networks. Wireless network devices use radio waves to communicate with each other.
The greatest vulnerability to the network is that rogue machines can "eves-drop" on the radio wave communications. To minimize the possibility of this, all modern access points and devices have configuration options to encrypt transmissions.
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