Exercise Chapter 9 - Discovering Computer 2011 - Living in Digital World

Martin - 1601213690

01 PBT

True / False

1.   True
2.   False
3.   True
4.   False
5.   True
6.   True
7.   False
8.   True
9.   False
10. True
11. True


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. * Test Messaging is a mobile device called SMS ( Short Message Service ), capability allows users to send and receive short text message, typically fewer than 300 characters, usually on a phone or other mobile device.
    * Mobile to mobile, mobile to E-mail, mobile to provider.

2. * It consist of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the receiver's geographic location.
    * GPS can be uses to assist people with determining where they are located, creating a map, ascertaining the best road between two points, locating a lost person or stolen object, determining altitude, and calculating speed, give information about nearby points of interest. In nowadays, many mobile devices such as as smart phone use GPS to provide drivers with directions or other information, and also GPS receiver work in conjunction with a cellular wireless network. Parents, for example, can locate a child's whereabouts through a cell phone equipped with a GPS receiver.

3. * Local Area Network is a network that connects computers and devices in a limited geographical area such as home, school, office, or closely positioned group of buildings.
    * MAN ( Metropolitan Area Network ) is a high speed network that connects local area networks in a metropolitan area such as city or town and handles the bulk of communications activity across the region.
       WAN ( Wide Area Network ) is a network that covers a large geographic area like a city, country, or world, using a communications channel, that combines many type of media such as telephone lines, cables, and radio waves.
       Wireless LAN is a network that use no physical wires.

4. * Network Topology refers to the layout of the computers and devices in a communications network.
    * ISDN lines, DSL, FTTP, T-Carrier lines, and ATM.

5. * ISDN modem, DSL modem, Cable modem :
     - ISDN modem => sends digital data and information from a computer to an ISDN line and receives digital data and information from a ISDN line.
     - DSL modem => sends digital data and information from a computer to a DSL line and receives digital data and information from a DSL line.
     - Cable modem => a digital modem that sends and receives digital data over the cable television network.