Network Media
In the last 15 years networks have gone through quite a lot of changes. Most of these changes were driven by two factors: reliability and speed. Today, older less reliable media have been replaced by similar media, but this newer media is made using better assembly techniques. Media, when referring to networks, is the medium data uses to go from point to point. There are two mayor types of media, bounded and unbounded. Bounded media is any network media that travels in a contained conductor, for example, wires, cables, and fiber optics. Unbounded media includes wireless transmission method such as radio, microwave, and infrared. In this paper we will discuss the different kinds of bounded media. Copper cable is made of either stranded or solid core wire. Copper wire is greatly affected by attenuation (degradation of signal as it travels long distances) and electrical noise. There are two types
The fiber cable is composed of a very thin glass core, and because it is made of glass it needs to be protected. Even though coaxial cable is highly resistant to electrical pulses, and provides great noise rejection it is rarely used today because of it tends to be unreliable when compared to other media. Just like coaxial and twisted pair, fiber cables come in two major categories, single-mode, and multimode. Because it uses light signals to transfer data I has a very high rate of data transfer. This media type is better suited for environments were electrical noise is a factor. Single-mode fiber as the name implies transfers data in a single direction, and only one signal at a time. It is not as susceptible to noise, electricity, and interference as the other media, also it is more secured. The STP or Shielded Twisted Pair has the same twisted pair wire as UTP, but has a shield wrapped around it to reduce noise. Other than the size of the cables (multimode being the bigger), the biggest difference between the two is the amount of data that it can be transfer at a time. Multimode fiber can carry more than one signal at a time. Each of those categories support different data transfer rate, but I will not go into detail on this. The glass core is covered by a silica cladding, and this is in turn is covered by a Kevlar arimid fibers. of coaxial cables, ThickNet and ThinNet. The Unshielded Twister Pair (UTP) is by far the most popular media used in today's networks. UTP comes in a variety of categories.
Common topics in this essay:
Fiber Optic,
,
ThickNet ThinNet,
Twisted Pair,
Pair UTP,
twisted pair,
data transfer,
bounded media,
coaxial cable,
data signal,
noise rejection,
media bounded,
major categories,
glass core,
using colors,
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