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ISDN stands for ___________

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ISDN stands for ___________

(a) Integrated Services Digital Network

(b) Integrated Services Discrete Network

(c) Integrated Services Digital Node

(d) Integrated Services Discrete Node

This question was addressed to me in an online quiz.

My doubt stems from Integrated Services Digital Network (ISDN) in portion Wireless Networking of Wireless/Mobile

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Right choice is (a) Integrated Services Digital Network

The best explanation: ISDN stands for integrated services digital network. It defines the dedicated signalling network that has been created to complement the PSTN for more flexible and efficient network access and signalling.

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