Question

22. ISDN is an important development in the field of -
(A) Computer Networks
(B) Telecommunications
(C) Air Communications
(D) Rail Communications
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Answer 1

Answer:

ISDN stands for- Integrated Services Digital Network.

ISDN is an important development in the field of - (B) Telecommunications

Explanation:

• ISDN or Integrated Services Digital Network is a critical-switched telephone network system that transmits both data and voice over a digital line.
• These digital lines could be copper lines. It was designed to move outdated landline technology to digital.
• ISDN was been out of necessity.
• Most of the people use ISDN for high speed internet when options like DSL or cable modern connections are not available.
• ISDN is core of telecommunications.
• ISDN is also used as a smart network technology intended to add new services to the public switched telephone network (PSTN) by giving users direct access to end to end circuit switched digital services and aa a backup or failsafe circuit solution for critical use data circuits.

Hence, ISDN is an important development in the field of - (B) Telecommunications

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