As you study this section, answer the following questions:
> How do light waves within a fiber optic cable travel around corners?
> What advantages do fiber optic cables offer over twisted pair cables and other media choices? What are the disadvantages of implementing fiber optic cables?
> What is the difference
LED
A light-emitting diode is a two-lead semiconductor light source that emits visible light when an electric current passes through it.
WDM
Wave Division Multiplexing (WDM) joins several light wavelengths (colors) onto a single strand of fiber.
2.3.2 Fiber Optic Facts
To connect computers using fiber optic cables, you need two fiber strands. One strand transmits signals, and the other strand receives signals. Long-haul runs sometimes only need one fiber. The send and receive signals are transmitted over the same fiber.
Fiber Optic Cabling Advantages
> Totally immune to EMI
> Highly resistant to eavesdropping
> Supports extremely high data transmission rates.
> Allows greater cable distances without a repeater
Fiber Optic Cabling Disadvantages
> Very expensive
> Difficult to work with
> Special training required to attach connectors to cables.
Single-Mode Fiber Cables
> Data transfers through the core using a single light path.
> The core diameter is around 8-10.5 microns.
> Cable lengths can extend a great distance.
> There is less modal dispersion, so bandwidths can be higher.
> Higher-cost electronics are required t
Multi-Mode Fiber Cables
> Data transfers through the core using multiple light paths.
> The core diameter is around 50-100 microns.
> There is more modal dispersion due to the multiple paths.
> Cable lengths are limited in distance and are dependent on bandwidth.
> Higher light
ST Connector
> Used with single-mode and multi-mode cabling.
> Has a keyed bayonet-type connector.
> Also called a push-in and twist connector.
> Each wire has a separate connector.
> Nickel plated with a ceramic ferrule to ensure proper core alignment and prevent lig
SC Connector
> Used with single-mode and multi-mode cabling.
> Has a push-on/pull-off connector that uses a locking tab to maintain connection.
> Each wire has a separate connector.
> Uses a ceramic ferrule to ensure proper core alignment and prevent light ray deflect
LC Connector
> Used with single-mode and multi-mode cabling.
> Composed of a plastic connector with a locking tab that is similar to a RJ45 connector.
> A single connector with two ends keeps the two cables in place.
> Uses a ceramic ferrule to ensure proper core alig
MTRJ Connector
> Used with single-mode and multi-mode cabling.
> Composed of a plastic connector with a locking tab.
> Uses metal guide pins to ensure that it is properly aligned.
> A single connector with one end holds both cables.
> Uses a ceramic ferrule to ensure pr
FC Connector
> Typically used with single-mode cabling.
> Each wire has a separate connector.
> Uses a threaded connector.
> Designed to stay securely connected in environments where it may experience physical shock or intense vibration.
Cabling Running Facts
For long cable running between floors or overhead, you might hire an experienced contractor to install the cable and the necessary connectors. Adding connectors onto a fiber optic cable takes some practice. Remember to complete the following:
> Keep the a
Fiber Optic Cable Facts
There are two light source technologies prevalent in fiber optic communications, diode laser and high-radiance light-emitting diode (LED). The light produced by the technologies is in the infrared region of the light spectrum.
> The most common wavelength
Wave Division Multiplexing (WDM)
Joins several light wavelengths (colors) onto a single strand of fiber.
> This enables light signals in both directions across a single fiber.
> Today's systems can easily multiplex 160 signlas.
> WDM is mostly used by long-haul and high speed providers.
Working with Fiber Optic Cabling
You can use media converters to switch between different network media. For example, you can convert:
> Single-mode fiber to copper Ethernet wiring
> Multi-mode fiber to copper Ethernet wiring
> Single-mode or multi-mode fiber to coaxial wiring
> Single-m
2.3.3 Connect Fiber Optic Cables Lab
You work as the IT administrator for a growing corporate network. You are in the process of creating an iSCSI storage area network (SAN) on the CorpiSCSI server. The server is currently connected to the network using an Ethernet cable. To increase the ser