Exam 5: Making Connections Efficient: Multiplexing and Compression

____,which is an abbreviation for MPEG (Moving Picture Experts Group)Audio Layer-3,is a common form of audio compression.

Dense wavelength division multiplexing is an expensive way to transmit signals from multiple devices due to the high number of differently colored lasers required in one unit.

A ____ multiplexes 24 input channels together onto one high-speed telephone line.

MPEG-1 and MPEG-2-or simply MPEG-are common examples of ____ compression.

In Stat TDM,the ____________________,provides information that the receiving multiplexor can use to detect transmission errors within the frame.

In frequency division multiplexing,the combined signals are digital.

To allow multiple users to share a single medium,FDM assigns each user a separate ____.

In WDM,the wavelength of each differently colored laser is called the ____________________.

The big advantage of frequency division multiplexing over synchronous TDM is the lower noise due to the use of digital signals during transmission.

A technique that can be used to compress data when a ____ compression is necessary is the Lempel-Ziv technique.

How does T-1 multiplexing work?

A video device displays multiple (typically 30)frames per second.

Frequency division multiplexing is the latest multiplexing technique.

Under normal circumstances,the synchronous time division multiplexor maintains a simple ____ sampling order of the input devices.

The STS multiplexor in a SONET network can accept electrical signals from copper-based media.

The T-1's original purpose was to provide a high-speed connection between AT&T's switching centers.

SONET and SDH are able to multiplex varying speed streams of data onto one fiber connection.

____________________,and Synchronous Digital Hierarchy (SDH)are two almost identical standards for the high-bandwidth transmission of a wide range of data types over fiber-optic cable.

Three types of synchronous time division multiplexing that are popular today are T-1 multiplexing,____ multiplexing,and SDH.

____________________ is a modulation technique that involves a four-bit code in which eight phase angles have a single amplitude,and four phase angles have double amplitudes.