Answer to Chapter 9

Chapter 9

True/False

1. T
2. F
3. T
4. F
5. T
6. T
7. F
8. F
9. F
10.T
11.T

Multiple Choice

1. C) Visual Voice Mail
2. C) A Web Conference
3. C) Provides for storage and management of a company's documents
4. D) Mashup
5. B) Hubs and switches
6. A) RFID
7. D) Coaxial Cable
8. B) Mobile TV


Matching

1. E
2. J
3. H
4. D
5. F
6. A
7. G
8. B
9. C
10.I

Short Answer

1. The capability that allows users to send and receive short text messages, typically fewer than 300 characters on phone or another mobile devices or computer.

->Mobile to mobile : send a message from your mobile device to another mobile device.

->Mobile to email: send a message from your mobile device to an email address anywhere in the world

->Web to mobile: send a message from a text messaging website to a mobile device, or request that a web site alert a mobile device with messages of breaking news and other updates, such as sports scores, and weather forecast.

->Mobile to provider: send a message by entering common short code (CSC) which is a four or five digits number assigned to a specific  content or, wireless service provider followed by the message, such as a vote for television program contestant or entry for sweepstakes.



2. Accepting and analyzing signals sent by satellites in order to determine the receiver’s geographical location.

 -> The data obtained from GPS then users apply it such as: creating a map, ascertaining the best route between two points, locating a lost person or stolen object, determining altitude and calculating speeds.


3. Different area of coverage.

->LAN = network that connects computers and device in limited geographical area such as a home, and office building.

->MAN = high speed network that connects local area networks in the metropolitan area such as a city or town.

->WAN = network that covers a large geographical area such as a country or the world.

Wireless LAN is a LAN that uses no physical wires. To access wireless LAN computer must have built-in wireless capability or the appropriate wireless network card, USB network adapter, or flash card.



4. Layout of the computers and device in communications network

->ISDN lines, DSL, FTTP, T-carrier lines and ATM


5. ISDN modem, DSL modem and cable modem

-> ISDN modem: send digital data and information from a computer to an ISDN line and receives digital data and information from an ISDN line

-> DSL modem:  send digital data and information from a computer to a DSL line and receive digital   data and information from DSL line

-> Cable modem: called a broadband modem, is a digital modem that sends and receives digital data over the cable television (CATV) network