Only
1% of the world’s data moves via satellite, the rest is carried through cables.
Deep-sea cables must be extremely strong to survive cuts, nicks and bites from
marine vessels and creatures, besides cyclones. They should withstand extreme
pressures at places where they lie miles under the surface of water. To achieve
that strength, a deep-sea cable is largely made up of
steel wires that play no role in data transmission. The real job
is done by a very thin core of fibre.
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