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
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page 327 WR 3
3. Yahoo! Web Directory
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