1. Quiz 5 Review Chapter 9,2 and 10
CCC
Quiz 5 Review
Chapter 9,2 and 10

2. Structure 14 Multiple Choice 34 True and False Chapter 9: 4

3. Chapter 10 Hierarchy of Data Access Privileges Character Field Record
File
Access Privileges
Read Only
Full Update

4. Chapter 10 Job Titles Database Analyst: Database Administrator:
Focuses on the meaning and usage of data
Database Administrator:
Creates and maintains data dictionary
Manages security
Monitors performance
Checks backup and recovery

5. Chapter 10 E-Commerce Business Models Business-to-Consumer (B2C)
Business-to-Business (B2B)
Business-to-Employee (B2E)
Consumer-to-Consumer (C2C)

6. Chapter 2
Internet: World-wide collection of networks that link millions.
Started with ARPANET
Originally 4 main computers
Before 1995 National Science Foundation (NSF) financed and controlled
Basically it is owned by its users
No ONE governing agent or individual
World Wide Web Consortium (W3C) oversees research and sets standards and guidelines

7. Chapter 2 Access Options ISP: Internet Service Provider IP Address
Dialup
DSL
ISDN
Cable Modem
ISP: Internet Service Provider
IP Address
Four groups of numbers separated by a period
Domain Name is text version
DNS Server translates the domain name into its associated IP address

8. Chapter 2 Portal Web site that offers a variety of Internet Services
Often first page to display
Yahoo, Netscape, MSN....

9. Chapter 2 Multimedia Graphics Animation
digital representation of nongraphic information
thumbnail: small version of larger graphic
Formats
Jpeg: compresses to reduce size, goal is to reach a balance between image quality and file size
Gif: compressed, few distinct colors
Png: improvement over Gif, expected to replace
Animation
appearance of motion

10. Chapter 2 Email Audio Video
music, speech or sound
MP3 – format that reduces file one-tenth of size
Streaming – transferring data in a continuous even flow. Can listen while it is downloading
Video
full-motion images played back at various speeds
MPEG: popular video compression standard
Transmission of messages and files via computer network

11. Chapter 2 Netiquette Code of acceptable behavior users should follow.In
Keep messages brief
Avoid Flames (abusive or insulting messages)
Be polite
Do not use all caps
Avoid sending spam

12. Chapter 2 Five major steps to web publishing Plan a web site
Analyze and design a Web site
Create a Web site
Web Page Authoring Software will speed up setp
Deploy a Web site
Web hosting service can host your web site
Maintain a Web site

13. Chapter 9 Communication Uses of Computer Communications
How two or more computers transfer data
Sending device
Receiving device
Communication channel
Uses of Computer Communications
Internet, , FTP, newsgroups, chat
Internet Telephony (Voice over IP)
talk with others over Internet
Need Internet Telephone Software

14. Chapter 9 Uses of Computer Communications Network Internet Printing
Print to Printer from IP address
Must have necessary software
Network
Collection of computers and devices connected together
Facilitate communication
Share hardware, date, information and software
Transfer funds

15. Chapter 9 Types of networks LAN: Local area network
MAN: Metropolitan area network
usually managed by consortium of users
WAN: Wide area network

16. Chapter 9 Network Architecture Design of computers, devices and media
Client/Server
Server: controls access
Client: rely on server for resources
Peer to Peer
Each peer has equal responsibility
Ideal for small business
Internet Peer to Peer
Internet network that users connect directly to each other
Sometimes called a file sharing network

17. Chapter 9 Network Topography Layout of the computers and devices
Bus Network
Single central cable
Inexpensive and easy to install
Ring Network
Cable forms a closed loop
If device falls all devices following it are also affected
Star Network
All nodes connect to a central device
If hub fails entire network is inoperable

18. Chapter 9 Network Communications Technologies Ethernet Token Ring
Allows nodes to contend for access
Most popular because relatively inexpensive and easy to install and maintain
Fast Ethernet
Newer standard that transfers at 100 Mbps
Gigabit Ethernet
Travels at 1 Gbps
Token Ring
Devices share or pass a special signal, token (or ticket)

19. Chapter 9 Network Communications Technologies TCP/IP IrDA
Manages transmission by dividing it into packets
packet switching
breaking message into packets, sending (along with sender info), reassembling data when it gets there
IrDA
Transfer wirelessly via infrared light waves
Uses Line of sight transmission (can not obstruct path)

20. Chapter 9 Intranet Communications over Telephone Networks
Applying Internet and Web technologies to internal networks
Communications over Telephone Networks
Nearly entire telephone network uses digital technology, except the final link from local telephone company to your home.
Dial-up Lines
Uses one or more analog lines
Dedicated Lines
Can be either analog or digital and provide constant connection
ISDN Lines
Requires both ends to have ISDN modems
DSL

21. Chapter 9 Communication Devices Dial-up Modem ISDN and DSL Modem
Cable Modem
Network Cards
Ethernet card is most common type
Routers
Have built-in firewalls for protection

22. Chapter 9 Communications Channel Bandwidth Latency Transmission media
amount that can travel over a communications line
Higher the better
Latency
time it takes a signal to travel from one location to another
Can be negatively affected by distance, type of transmission and number of nodes
Transmission media
materials capable of carrying one or more signals
Broadband
transmit multiple signals simultaneously

23. Chapter 9 Physical Transmission Media Twisted Pair Cable Coaxial Cable
Consists of one or more twisted pair wires bundled together
Most commonly used
Coaxial Cable
Consists of a single copper wire surrounded by at least three layers.
CATV wiring uses coaxial because it can be cabled over longer distances than twisted pair
Fiber Optic
Consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signal
Can carry significantly more signals than wire cables

24. Chapter 9 Wireless Transmission Media Infrared Broadcast Radio
Needs transmitter to send signal and a receiver to accept it
Cellular Radio
Microwaves
Satellite
Space station that receives microwave signals from an earthbased station, amplifies (strengthens) and broadcasts back over a wide area
Transmission from satellite to earth based station is download