1. Intro to Digital Technology Follow along and fill in your Guided Notes Handout.

2.  A collection of computers and devices connected together

3.  Facilitate communications  Share hardware  Share data & information  Share software  Transfer funds

4.  Facilitating Communications- email, IM, chat rooms, blogs, etc.  Sharing hardware-save money  Sharing data & information- access to database for customers  Sharing software-save money  Transferring funds-payroll, make purchases on the Internet

5.  Local area network (LAN)  Wireless local area network (WLAN)  Metropolitan area network (MAN)  Wide area network (WAN) Difference: the area of coverage

6.  Limited geographical area  Home  School computer lab  Office building

7.  LAN with no physical wires  Usually communicates with a wired LAN

8.  High- speed network that connects LANs in a metropolitan area such as a city or town and handles the bulk of communications activity across that region.  Regulated by local or state government  Provided by telephone companies, cable television operators, and other organizations

9.  Covers a large geographic area ( such as a city, country, or the world)  Combines many types of media such as telephone lines, cables, and radio waves  What is the world’s largest WAN?

10.  Design of computers, devices, and media in a network  Two Categories  Client/server  Peer-to-peer Do you know any examples?

11.  Server-host computer  Controls access to hardware, software, and other resources  Provides central storage area  Clients  Other computers and devices on the network that rely on the server for resources  EX. Server stores database of customers, Client access database

12.  10 or more computers

13.  Simple, inexpensive  Less than 10 computers  Equal responsibilities and capabilities

14.  Users access each others hard disks and exchange files directly over the Internet  Examples:  Limewire  BitTorrent  Gnutella  Kazaa

15.  Layout of the computers and devices in a communications network.  Four most common:  Bus  Ring  Star  Mesh

17.  Single central cable, to which all computers and other devices connect

18.  A cable forms a closed loop (ring) with all computers and devices arranged along the ring

19.  All of the computers and devices ( nodes) on the network connect to a central device, thus forming a star

20.  Each component is connected to every other component.

21.  Internal network that uses Internet technologies  Make company information accessible to employees  Examples:  telephone directories, event calendars, procedure manuals, employee benefits information, and job postings What about an example here in the school?

22.  PBS Interactive Lesson PBS Interactive Lesson