Saturday 7 April 2012

Fiber Optic Cable



Fiber Optic Cable
           Consists of a small core of glass or plastic surrounded by a cladding layer and jacket.
           Fibers are unidirectional (light only travels in one direction) so two fibers are used, one for sending and one for receiving. Kelvar fibres are placed between the two fibres for strength.
           Good for very high speed, long distance data transmission.
           NOT subject to electrical interference.
           Cable can't be tapped and data stolen => high security
           Most expensive and difficult to work with.
           Immune to tapping.
           can transmit at 100 Mbps and way up to 2 Gbps
           up to 2000 meters without a repeater.
           Supports data, voice and video.
needs specialized knowledge to install => expensive all round.
Cable Type Comparisons
Type
Speed
Distance
Installation
Interference
Cost
# of nodes per segment
# of nodes per network
10BaseT
10 Mbps
100 meters
Easy
Highly susceptible
Least expensive
1 computer

100BaseT
100 Mbps
100 meters
Easy
Highly susceptible
More expensive than 10BaseT


STP
16 to 155 Mbps
100 meters
Moderately Easy
Somewhat resistant
More expensive than Thinnet or UTP


10Base2
10 Mbps
185 meters
Medium Difficulty
Somewhat resistant
Inexpensive
30
1024
10Base5
10 Mbps
500 meters
More difficult than Thinnet
More resistant than most cable
More expensive than most cable
100
300
Fiber Optic
100 Mbps to
2 Gbps
2000 meters
Most difficult
Not susceptible to electronic interference
Most expensive type of cable