Fiber optic cables are constructed with a central

Info icon This preview shows pages 16–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Fiber optic cables are constructed with a central core that is made of either clear plastic or glass. The central core is able to carry light pulses along the wire. Surrounding the central core is a layer of cladding that has a reflective surface, which plays an important role. As light travels down the central core here, some of it has a tendency to leak out. The cladding reflects the stray light pulses and redirects them towards the center of the core. Around the cladding is usually one or two protective layers that help prevent the central core from getting broken or damaged. Everything is then surrounded by a plastic sheath. Fiber optic cabling comes in two different types. The first type is known as single mode fiber, or SMF.Single mode fiber cables transfer data using a single light ray. The internal core in these types of cables is very small, about 10 microns in diameter. This small core prevents the light from bouncing around too much allowing for very long cable lengths and high data transfer rates. The second type is known as multi-mode fiber. Multi-mode fiber cables have a larger internal core, about 50 to 100 microns. This larger core allows multiple rays of light to be sent along the cable at the same time. However, this also allows the light to bounce around a lot, which diffuses the light and reduces the maximum length of the cables. Advantages and Disadvantages 10:20-11:16 Fiber optic cabling has a lot of benefits over the other network media we've talked about. First off, fiber optic cabling is extremely fast. It's actually the fastest type of network medium. Fiber optic cabling is also immune to EMI. Because the transmission medium is light, no EMI is emitted, and EMI from external sources do not affect the communications at all. This also makes eavesdropping impossible. Fiber optic cabling also has the longest transmission distances compared to other bounded network media. However, fiber optic cabling is very, very expensive compared to other types of network media. Fiber optic cabling also isn't as flexible as twisted pair or coaxial cables. If a fiber optic cable is bent too much the internal core can actually break. In addition, the connectors on fiber optic cabling can't be installed that easily. You actually need special training to be able to do so. Summary 11:17-11:31 Those are the different types of network media that are used in the networking world. Remember, different network media have different technical specifications and communication methods. They also have different advantages and disadvantages. By knowing this information you will be able to select the best network medium for any application. Coaxial cable is primarily used to carry broadband Internet signals. Coaxial cable is built with the following components: The inner conductor carries data signals and is made of solid copper or tin.
Image of page 16

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern