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Q.

STD and ISD are associated with


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a

Telephone Network

b

Newspaper network

c

Computer network

d

Radio network 

answer is A.

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Detailed Solution

STD and ISD are associated with Telephone Network.
ISD: International Subscriber Dialling (ISD) is the term used to depict a worldwide call dialled by the guest as opposed to going through an administrator.
STD: Stands for Subscriber Trunk Dialling. It was introduced when supporters used to settle on significant distance decisions without administrators' help.
 
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