Question

Which of the following is a type of ISDN (Integrated Services Digital Network)?

• A. Narrow band
• B. Broad band
• C. Both $\left(1\right)$ and $\left(2\right)$
• D. None of these

Answer 1

The correct option is C Both $\left(1\right)$ and $\left(2\right)$

ISDN (integrated services digital network) is a set of communication standards for simultaneous digital transmission of voice, video, data and other network services over the traditional circuits of the public switched telephone network. Narrow band is designed to operate over the current communications infrastructure, which is heavily dependent on the copper cable. Broadband relies on the evolution of fiber optics.