My abacus needs a network upgrade

What type of network uses 2B+D?


B) Cable Modem


D) Cellular

E) The higher math network

The answer: A) ISDN

An ISDN Basic Rate Interface (BRI) uses two bearer channels to carry data (2B) and one signaling channel (D). We commonly refer to this arrangement as 2B+D.

Want to know more? Watch “Internet Connection Types.”

There are many different methods available today to provide us with access to the Internet. In this video, you’ll learn some of the most common methods for connecting to the World Wide Web.