The Straight Cable, The Crossover Cable and Color Coding Of The Wires, Ethernet
The Straight Cable, The Crossover Cable and Color Coding Of The Wires
The Straight Cable
The straight cable is a through cable, and it connects to the switch or hub. These cables function as the patch cords in an Ethernet connection. Both ends of these wires are the same. The TIA/EIA 568A standard has been replaced by TIA/EIA 568B. However, both cable standards are still used. They are similar, but are not the same. Both standards use unshielded twisted pair cables.
The Crossover Cable
The crossover cable formation can be used without a hub or switch. It is used in a peer-to-peer connection. It is used when one needs to connect two Ethernet devices together without a hub or switch. It can also be used to connect two hubs to each other. The simplest way to achieve this is to use the 568 A at one end and the 568B at the other end of the RJ45 plug.
Color Coding Of The Wires
There are a total of eight wires inside the cable, twisted into four pairs. Each pair has a primary solid-colored wire and another one with a primary white with a colored stripe running through its center. The stripe in the pair is of the same color as the solid color. The pinout for the cable 568A going from position one (that is, the wire that is attached to pin 1 of the RJ45 plug) is white/green, green, white/orange, blue, blue/white, orange, white/brown, brown, and that for the 568 B is white/orange, orange, white/green, blue, white/blue, green, white/brown, and brown. The easiest way to remember how to wire a crossover cable is to switch the set of wires, that is, to switch the solid green and the solid orange and the white/green and the white/orange.
What is Ethernet
Ethernet is the most common LAN (Local Area Network) technology in use today.
Ethernet was developed by Xerox in the 1970s, and became popular after Digital Equipment Corporation and Intel joined Xerox in developing the Ethernet standard in 1980.
Ethernet was officially accepted as IEEE standard 802.3 in 1985.
The original Xerox Ethernet operated at 3Mbps. Ethernet networks up to 10Gbps now exist.
What is the Ethernet Cable Pinout
Ethernet cable is used to connect an network interface card (NIC) with a hub or Ethernet switch. Ethernet cables can be readily purchased from a computer store. They come in two categories, flat and braided. The flat, or solid, cable is used when there is a need for a longer cable run. However, it is not flexible; thus, its position is fixed. The braided cable is easier to use and is more flexible. However, it is useful only in places where a shorter cable run is needed. In the Ethernet cable pinout there are basically two cables: (1) the straight cable and (2) the crossover cable. The cables are color-coded. It is very important to connect the cables properly because improperly connected cables can lead to loss of Internet connectivity. The straight cables can be used to make a crossover cable when needed.
What Is Required For An Ethernet Cable Pinout
• Category 5/5e or 6 braided or solid cable (decide according to usage)
• RJ45 ends
• A crimper
• A wire cutter
Ethernet Topologies
Ethernet 10Base-5 and 10Base-2 used a bus topology. Bus topologies were difficult to maintain and troubleshoot.
Modern Ethernet networks use a star topology with an Ethernet hub, switch, or router at the center of the star.
It is still possible to create a two-node Ethernet network in a bus topology using a null-Ethernet cable between the two devices.
Ethernet DTE and DCE
All nodes on an Ethernet network are either DTE (Data Terminal Equipment) or DCE (Data Communications Equipment).
Ethernet DTE are devices such as computers and printers which are trying to communicate on the Ethernet network.
Ethernet DCE are devices such as switches and routers which are trying to help other devices communicate on the Ethernet network.
Ethernet CSMA/CD
Like any network, Ethernet must have an algorithm for determining when each network node is allowed to communicate.
In Ethernet, this algorithm is known as CSMA/CD (Carrier Sense Multiple Access / Collision Detection).
CSMA/CD has proven to be a very capable, if highly anarchistic, algorithm.
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