Exam 11: Voice and Data Delivery Networks

____ are permanent direct connections between two specified points.

There is only one DSL format in use today.

The ____ allows the customer to exceed the committed information rate by a fixed amount for brief moments of time.

A real-time interactive application is one of the most demanding with respect to data transmission rate and network throughput.

ATM transfer rates are as fast as 311 Mbps.

A(n)____ connection has a faster downstream transmission speed than its upstream speed.

_______________ is the term for the convergence of real-time and non-real-time communications services such as telephony,instant messaging,video conferencing,speech recognition,voice mail,and email into a single interface.

Prior to 1984,AT&T (American Telephone and Telegraph)owned all the long-distance telephone lines in the United States.

Because DSL is an always-on connection,it uses a ____ circuit instead of a switched circuit.

The permanent connection in a frame realy network that is necessary to transfer data between two endpoints is called a(n)___________________________________.

The ______________________________ paved the way for anybody to offer a local telephone service to homes and businesses.

DSL and cable modems are more expensive than frame relay systems at comparable speeds.

____________________ is a slower format compared to ADSL; also known as Universal DSL,G.Lite,and splitterless DSL.

A(n)____ is a service from local telephone companies in which up-to-date telephone facilities at the telephone company's central (local)office are offered to business users,so that they don't need to purchase their own facilities.

A(n)____ handles all in-house calls and places calls onto outside telephone lines.

____________________ lines and tie lines are leased telephone lines that require no dialing.

____ means that users have the ability to control a call-for example,set up a conference call-without being a part of it.