Match the items on the right to the items on the left:

Data is transmitted in a telecommunications circuit by means of an electrical signal called the carrier or
In order for a carrier to convey information, some form of
The mode of modulation can be broadly categorized as either
Telecommunications systems are generally run by telecommunications service providers, also known as
These providers historically offered telephone and related services and now offer a variety of internet and WAN services, as well as metropolitan
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