📝 One-liners · 44 cards
Data Communication Network and Eft Systems
Twisted Pair — Construction / Speed / Distance / Banking Use?
Construction: Two insulated copper wires twisted to reduce cross-talk; Speed / Distance: Up to 150 m between terminal & computer; Banking Use: Cheapest; most popular for short LAN runs
Coaxial Cable — Construction / Speed / Distance / Banking Use?
Construction: Inner copper core, insulation, protective sheath; Speed / Distance: Up to 500 Mbps (digital); Banking Use: Higher bandwidth, prevents interference
Optical Fibre — Construction / Speed / Distance / Banking Use?
Construction: Very thin glass/plastic fibre carrying a beam of light; Speed / Distance: Up to 2 Gbps, very low error rate; Banking Use: Immune to electromagnetic interference; backbone of modern bank WANs
Simplex — Direction of Flow / Real-Life Example?
Direction of Flow: One way only; sender cannot receive, receiver cannot send; Real-Life Example: Commercial radio broadcast
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