Fiber Optic Cable

Fiber optic cables are networking cables which uses small strand of glasses.It uses light pulses to send the data from one point to other,so it also immune from Electro Magnetic Interference. It is nearly impossible to interpret the data traveling through fiber optic cable.However they are not the inexpensive option when setting up network of computers.Although some companies have started moving from typical copper wires to fiber optic cable,its an expensive choice.It is very prone to twist turns and run over.They can't be repaired only available option is there replacement.They are best choice when it comes to bandwidth,speed,resistance and speed.There are two types of fiber optic cable,single mode and multi mode.Single mode fiber cable can be used when sending data over long distance.Multi mode fiber cable can be used when sending data over shorter distance.

Redundant Array of Independent Disk (RAID)

RAID is a technology which uses two or more disk for storage,reliability,availability,fault tolerance. They can have a disk range from minimum of 2 to maximum of 32.Raid are of several level of RAID based on the specifications and configurations.RAID 0 writes data on striped volume,it writes the data into small chunks across all the volume.Reading and writing on RAID 0 devices is faster.However striped volumes are not fault tolerant,that means if one disk fail it would be impossible to recover the data stored on the volumes.RAID 1 is also known as disk duplexing,there is no striping of data,read performance is better since data can be read from any of the disk and it also fault tolerant.RAID 2 is rarely used ,it writes the the across the disk with parity error information.RAID 3 dedicates one disk to store the parity information for data recovery in case of disk failure.RAID 4 writes data in blocks with dedicated parity.RAID 5 uses block level striping with distributed parity,which can be used to regenerate the data in case of disk failure.Usually RAID devices use SCSI interface with multi-pins to connect to server.