Question 1

A simplex channel supports communications in only one direction,like the circuit in your home that connects the doorbell to a ringer.

Accepted Answer

A simplex channel allows for communication in only one direction, similar to the doorbell circuit that connects the doorbell button to the ringer.

Question 2

Public Wi-Fi networks usually default to nonencrypted communications.

Accepted Answer

Public Wi-Fi networks often do not have encryption enabled by default, which means that sensitive information transmitted over the network can be intercepted and accessed by unauthorized individuals. Users should exercise caution when using public Wi-Fi and consider using a virtual private network (VPN) or other security measures to protect their data.

Question 3

Collaboration tools,including instant messaging,Web conferencing,and desktop sharing,will continue to help virtual teams stay connected and work collaboratively and productively.

Accepted Answer

Collaboration tools such as instant messaging, web conferencing, and desktop sharing are specifically designed to help virtual teams communicate and collaborate effectively. With the increasing number of remote and distributed teams, the use of these tools is likely to grow and become even more important for ensuring productivity and team cohesion.

Question 4

Free hot spots often are provided by businesses or governments that seek to offer a worthwhile service to customers,citizens,and visitors.

Accepted Answer

Free hot spots are often provided by businesses or governments to provide a valuable service to customers, citizens, and visitors.

Question 5

Both the base station and cell phone transmitter operate at relatively high power levels.

Accepted Answer

Base stations typically operate at higher power levels than cell phone transmitters, which operate at lower power levels to conserve battery life and reduce exposure to radiofrequency energy.

Question 6

Almost all Wi-Fi networks are operated free of charge.

Accepted Answer

While many public places offer free Wi-Fi, not all Wi-Fi networks are free. Many private and commercial networks require payment or a subscription to access.

Question 7

The capability to identify and launch new services quickly is a critical success factor in the telecommunications industry.

Accepted Answer

In the highly competitive telecommunications industry, the ability to introduce new and innovative services quickly is a key factor in attracting and retaining customers. Companies that are able to identify market trends and respond with new services faster than their competitors are more likely to succeed. Hence, it is true that the capability to identify and launch new services quickly is a critical success factor in the telecommunications industry.

Question 8

A growing number of organizations are restricting employees from creating their own personal blogs.

Accepted Answer

The answer of A growing number of organizations are restricting...

Question 9

Remote log-in allows users to connect to their office computer while they are away from the office.

Accepted Answer

Remote log-in technology allows users to access their office computer from anywhere with an internet connection. This is particularly useful for individuals who work remotely or need to access files and applications on their office computer while away from their desk.

Question 10

In many countries,3G networks do not use the same radio frequencies as 2G,so 3G service providers must build entirely new networks and license entirely new frequencies.

Accepted Answer

In most cases, 3G networks do not use the same radio frequencies as 2G, which requires service providers to build new networks and license new frequencies, making option A true.

Question 11

Manufacturers typically ship their products with a unique default SSID name for security purposes.

Accepted Answer

Manufacturers ship products with a default SSID name for identification and convenience, not specifically for security purposes.

Question 12

Over time,the way people collaborate has evolved starting with communications over distances via smoke signals,to face-to-face sign language and verbal communications,to telegraph,and telephone.

Accepted Answer

The answer of Over time,the way people collaborate has evolved...

Question 13

CDMA systems can provide between 20 to 30 times the call carrying capacity of analog equipment.

Accepted Answer

The answer of CDMA systems can provide between 20 to...

Question 14

A wiki workspace is an area hosted by a Web server in which project members and colleagues can share documents,models,photos,and other forms of information to keep each other current on the status of projects or topics of common interest.

Accepted Answer

The answer of A wiki workspace is an area hosted...

Question 15

City officials have been attracted to the idea of establishing wireless networks for use by meter readers and other municipal workers,as well as providing low-cost Internet access to its citizens and visitors.

Accepted Answer

This statement suggests that city officials are interested in establishing wireless networks for multiple purposes, including use by meter readers and other municipal workers and providing internet access to citizens and visitors at a low cost.

Question 16

A cell phone uses two frequencies to support each call,thus creating a full-duplex communications link.

Accepted Answer

A cell phone uses two frequencies to support each call, one frequency for transmitting and another for receiving simultaneously, thus creating a full-duplex communications link.

Question 17

The BlackBerry,manufactured by Research in Motion,makes mobile e-mail an option and has changed the lives of busy workers by breaking down the walls between work and home and allowing for an easier nine-to-five work schedule.

Accepted Answer

The BlackBerry allowed for constant connectivity, often leading to work extending beyond the traditional nine-to-five schedule, rather than making it easier.

Question 18

Wi-Fi uses a licensed spectrum to provide access to a network,typically covering only the network operator's own property.

Accepted Answer

Wi-Fi uses an unlicensed spectrum and can cover a limited geographic area including public locations like cafes, airports, and libraries as well as private locations like homes and offices.

Question 19

EDGE defines new signal modulation schemes that will permit much higher data rates to be achieved in GSM and TDMA networks.

Accepted Answer

EDGE (Enhanced Data rates for GSM Evolution) is a new modulation scheme that increases data rates in GSM and TDMA networks.

Question 20

Most laptop computers come with built-in wireless transmitters and software to enable computers to discover automatically the existence of a Wi-Fi network.

Accepted Answer

Most laptops come with built-in wireless transmitters and software that allows them to detect nearby Wi-Fi networks automatically.

Quiz 6: Collaboration Tools and Wireless Networks