Exam 17: Wireless Lans

The objective of the __________ generation of wireless communication is to provide fairly high-speed wireless communications to support multimedia,data,and video in addition to voice.

The ____________ is a universal,open standard developed by the WAP Forum to provide mobile users to access telephony and information services including the Internet and the Web.

A widely used first-generation system was the ______________,which was widely used in North and South America,Australia,and China through the 1980s and into the 2000s.

Which of the following is NOT one of the components of the WAP specification?

The idea of universal personal telecommunications refers to the capability of using one's terminal in a wide variety of environments to connect to information services.

The electronics in the satellite that takes an uplink signal and converts it to a downlink signal is called a _________ .

Transmissions from the satellite to the earth station are __________.

As cells become smaller,antennas move from the tops of tall buildings or hills,to the tops of small buildings or the sides of large buildings,and finally to lamp posts,where they form ___________.

Wireless networks are more susceptible than wired networks to interference,signal loss,noise,and eavesdropping.

Because of the limited frequencies available,a key design element of any cellular system is to ___________.

There are basically four ways to divide the spectrum among active users: frequency division multiple access (FDMA),time division multiple access (TDMA),code division multiple access (CDMA),and ______________.

Satellite communications is comparable in importance to optical fiber in the evolution of telecommunications and data communications.

In 4G networks,IP telephony is the norm as are IP packet- switched connections for Internet access.

The two types of channels that are available between the mobile unit and the base station are control and ___________.

The antenna systems on or near the earth are referred to as earth _________ .

A __________ is a mobile device that mobile workers can use as a personal information manager.

When using wireless systems,you are limited in how often you can use the same frequency band for different communications because the signals are not constrained and can interfere with each other even when separated geographically.

_________ was developed to address the limitations of cellular and other wireless networks for providing data services to mobile devices.

In cellular communications systems,base stations (BS)are located in the geographic center of cells and handle communications between mobile units and the rest of the network.

The objective of the third generation of wireless communication is to provide high-speed wireless communications to support multimedia,data,and video,in addition to voice.