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Fiber Distributed Data Interface (FDDI)

By Exforsys | on March 6, 2008 |
Networking

Fiber Distributed Data Interface (FDDI)

The Fiber Distributed data interface or the FDDI is a 100 mbps line using the LAN network and is connected through a fiber optic cable. The FDDI technology is used where the networks need a high speed bandwidth and need to cover huge distances than the copper wires usually cover. There are two kind of networks in this category, one is the fiber optic wire based and the other is the copper wire based called the Copper distributed data interface.

The inside architecture of the FDDI is based on the dual rings where the data is flowing in the opposite directions. There are two levels of rings the primary and the secondary. Most of the data transmission takes place using the primary ring and the secondary is idling. However in case the primary does not work the secondary takes over the primary’s functionalities.

FDDI Functionalities

In FDDI the primary cable that is used is the fiber optic cable but the technology can be used on copper wires also. The fiber optic cables have clear advantages over the copper cables. There is more security, and the fiber optic cables are more reliable than any other wire available. The data transfer in the fiber optic cable takes place without any electrical signals being transmitted.

This enhances the security because the electrical signals can usually be tapped and therefore a data breach can occur otherwise. Also the added advantage of not having the electrical signals is that the radio frequency and other electromagnetic waves are incapable of interfering with the fiber optic media. The data flow is undeterred and constant through a fiber optic cable. Long distances can be covered for data flow using the fiber optic cable using a single node.

Fiber Distributed Data Interface Types

There are two types of fiber distributed data interface mainly. The single mode interface and the multi mode interface. The mode here specifies the light or the single ray of light that is entering the fiber optic cable. The Multimode fiber uses the LED display to generate the light rays and the single mode uses the laser technology to generate the light rays.

The difference in both these methods is that multi mode as the name suggests allows many rays at one single point of time to pass and the single mode laser allows one ray at one time to pass through. However the angles at which the light reflects on the cable are all different so by the time they reach the nodes the time at which they arrive is different. In a single mode there is no such confusion so the data arrives at the node in a streamlined fashion.

The methodology which the multi mode uses is called modal dispersion and it is used in an environment which has limited boundaries. In comparison with the multi node the single node will be able to carry more data and deliver at a higher speed along with covering larger distances.

Conclusion

After the advent of FDDI internet has advanced to a great extent even with common day to day users. The internet service providers are able to provide better services to the people and are able to facilitate internet in a better fashion. Also since internet has advanced and the number of users has increased, more and more businesses have started e-commerce applications on the internet. Because the fiber distributed data interface is a safe and secure medium when it comes to cables the ecommerce transactions have found a reliable media. FDDI through single node transfers are widely adapted by MNC’s for communication between different branches.

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Editorial Team at Exforsys is a team of IT Consulting and Training team led by Chandra Vennapoosa.

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