Class Discussion



Class Discussion

27/28 November 2006

Chapter 4

1. motherboard dcf3e/ch4/weblink

2. processor

a. ALU

b. control unit

3. machine cycle

4. system clock

5. bit

6. byte

7. ASCII vs EBCDIC page 141 figure 4-8

8. memory

a. RAM -- volatile

b. ROM -- nonvolatile

9. storage

nonvolatile

10. cache memory

a. L1 built into the processor chip

b. L2 built on the processor chip

c. L3 built off the processor chip

Chapter 7

1. booting

a. warm boot -- restart

b. cold boot

2. operating system

a. provide user interface – gui

b. manage programs

c. manage memory

d. scheduling work (jobs)

e. configuring devices

i. device driver

ii. plug & play – page 256 web link 7-1

f. manage internet access – controlling networks

g. monitoring performance

h. manage files

i. administer security

i. user name – user ID

ii. password

iii. firewalls

j. utilities

i. firewalls

ii. disk scanner

iii. disk defragmenter

iv. diagnostics

v. backup

vi. screen saver

1. privacy

2. screen burn out

3. stand-alone operating systems

a. DOS

b. Windows XP

c. Mac OS/X

d. Unix

e. Linux

4. network operating systems

a. Novell Netware

b. Windows Server 2003

c. Solaris – Sun Microsystems

d. Linux

e. Unix

5. embedded operating systems

a. Windows CE

b. Windows Mobile

c. Palm OS

d. embedded Linux

e. Symbian OS

6. stand alone utility programs

a. antivirus programs

i. worm

ii. virus

iii. Trojan horse

b. spyware remover

c. internet filters

i. anti-spam programs

ii. web filters – restricts access

iii. pop-up blockers

d. file compression utility – zipped files

e. CD/DVD burning software

Chapter 8

1. internet telephony – telephone connected to a computer

2. FTP – file transfer protocol

3. HTTP – hypertext transfer protocol

4. GPS – global positioning system – page 301 web link 8-2

5. group ware – workgroup computing

6. voice mail vs answering machine

a. voice mail – digital storage of messages

b. answering machine – analog storage of messages

7. networks

a. LAN – local area network

b. MAN – metropolitan area network – local government agencies

c. WAN – wide area network – federal government agencies, internet

8. network architectures

a. client-server network

b. peer-to-peer network -- share devices connected to computers

c. file-sharing network (P2P) -- internet network – each user has access to the shared files on the other users’ hard disks

9. network topologies

a. bus network

b. ring network

c. star network

10. network communication standards

a. Ethernet – all nodes are free to initiate communication – collisions – bus or star topology

b. token ring – ring or star topology – pass token

c. TCP/IP – packets – address, sequence number, error checks, sender, destination – Internet standard

d. Wi-Fi 802.11 – wireless communications – similar to Ethernet standard

e. Bluetooth – short-wave radio – 100 meters limit

f. IrDA – infrared light waves – line-of-sight transmission

g. RFID – radio signals –

memory chip + antenna in transponder tag ( transceiver (reader)

i. active – battery – broadcasts signal

ii. passive -- reader activates tag’s antenna by sending electromagnetic waves

h. WiMAX 802.16 -- radio waves – WiMAX tower – 30 miles – network of WiMAX towers

11. Dedicated Lines

a. ISDN Lines – copper wire – 128 Kbps

b. DSL – copper wire -- 8.45 Mbps

c. CATV – cable TV – 36 Mbps

d. T-Carrier Lines – 768 Kbps – 44.7 Mbps

e. ATM – 10 Gbps

12. Modems – analog signals (( digital signals

13. Routers – connects multiple nodes to internet; transmits data to correct destination

14. Physical Transmission Media

a. Twisted-pair Cable

b. Coaxial Cable

c. Fiber-Optic Cable

Chapter 9

1. character

2. field

a. field name

b. field size

c. field data type

3. record

4. data file

5. data base maintenance

a. adding records

b. changing records

c. deleting records

d. data validation

i. alphabetic/numeric check

ii. range check

iii. consistency check

iv. completeness check

v. check digit

6. SQL -- Query Language – page 344 figure 9-13

7. Query by Example – page 345 figure 9-14

8. Forms

a. data entry

b. changing data

9. Report Generator

10. Relational Databases

11. Object-Oriented Databases

12. Data Warehouses

Chapter 11

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page 140 quiz 4-1

dcf3e/ch4/quiz

KB – 1000 – ½ page of text

MB – 1,000,000 – 500 pages of text

GB – 1,000,000,000 – 500,000 pages of text

TB – 1,000,000,000,000 – 500 million pages of text

page 144 Web Link 4-4

page 144 Web Link 4-3

page 265

closed source vs open source

versions of Unix

PDA’s

smart cell phones

smart watches

Set-Top Boxes – cable TV boxes

internet phones – voice over IP devices

personal information manager PIM

industrial control devices

point-of-sale terminals

security robots

navigation systems – GPS

media players

computerized sewing machines

page 275 WR 2 Scavenger Hunt

#5 “Larry the cow’s” relationship to Linux

$&0Z[„…¿ÀÇÉÙÚîïðø | v x ‚ i€¥☼

page 327 WR 3

3. Yahoo! Web Directory

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