1. Teaching and Learning with Technology  Allyn and Bacon 2002 Networks and the Internet Chapter 7 Technology in Teaching and Learning

2. Teaching and Learning with Technology  Allyn and Bacon 2002 Networking Basics A network Is a collection of computers and peripherals connected together Networked workstations connect to a server via hubs Servers are more powerful computers that provide service to users Allows users on the network to communicate Allows sharing of resources and data

3. Teaching and Learning with Technology  Allyn and Bacon 2002 Networking Basics Routers are used to connect multiple networks together and route data to the correct network Twisted pair wiring is strung to create nodes, or network outlets Network interface cards (NICs) are plugged into the node to connect a computer to the network

4. Teaching and Learning with Technology  Allyn and Bacon 2002 Networking Basics Wireless networks Use transmission via infrared, radio wave, or microwave instead of cables Save the dollars it costs to retrofit schools May require line-of-sight transmission to work Offer a more flexible networked instructional environment

5. Teaching and Learning with Technology  Allyn and Bacon 2002 Networking Basics Local Area Networks (LANs) Serve a local area such as a single school Wide Area Networks (WANs) Serve a wider area such as a school district WANs typically include multiple LANs

6. Teaching and Learning with Technology  Allyn and Bacon 2002 Networking Basics Network Challenges All computers must use the same protocol or communication method Bandwidth must have sufficient carrying capacity so that data will be transmitted at reasonable speeds Networks must provide sufficient security and privacy to protect data and users

7. Teaching and Learning with Technology  Allyn and Bacon 2002 Using a Network Networked Programs -- Advantages Programs can be installed on the server and used by all workstations Programs on servers are easier to install and maintain Require less hard drive space of individual workstations May be more economically purchased as site licenses than for individual copies

8. Teaching and Learning with Technology  Allyn and Bacon 2002 Using a Network Sharing Data Every user is typically allocated some hard drive space on the server Server drive space lets users log into any workstation at any location to access their data Data can also be placed in public areas of the server to be shared with others

9. Teaching and Learning with Technology  Allyn and Bacon 2002 Using a Network Administrative Network Tools Administrative groupware offers common calendars, schedules, address books, and reservations lists Academic Network Tools Lets teachers monitor, control, and share images on all classroom workstations

10. Teaching and Learning with Technology  Allyn and Bacon 2002 Using a Network Hardware Sharing Allows sharing of printers, scanners, or other hardware devices among multiple workstations Saves on cost of multiple peripherals Allows monitoring of and access to costly peripherals

11. Teaching and Learning with Technology  Allyn and Bacon 2002 Using a Network Communications Email is a software program included in most networked environments Email allows users on a network to send and receive electronic messages with attachments Offers asynchronous communication between students, teachers, and parents

12. Teaching and Learning with Technology  Allyn and Bacon 2002 Telecommunications Telecommunications refers to electronic communications between computers via phone lines When not directly connected to a network, telecommunications offers an alternative connection Modems are necessary to convert signal from digital to analog so that they can be carried on phone lines

13. Teaching and Learning with Technology  Allyn and Bacon 2002 Telecommunications Modems Vary in terms of speed of transmission May be internal or external relative to the computer Require telecommunications software to set them up and control transmission Networks may include multiple modems to allow connections from home computers

14. Teaching and Learning with Technology  Allyn and Bacon 2002 Telecommunications Connecting to a Network Once modems connect, you will need your login and password to get on the network May not be as fast as a workstation since phone lines have small bandwidth ISDN and DSL lines are higher bandwidth phone lines to make access faster Cable modems offer a faster alternative to phone lines for high speed connections

15. Teaching and Learning with Technology  Allyn and Bacon 2002 The Internet A collection of interconnected individual networks Uses a common protocol, TCP/IP Not owned or operated by any one entity but instead is a collaborative effort to connect and communicate among networks Loosely regulated by the Internet Society to develop and maintain common standards and procedures

16. Teaching and Learning with Technology  Allyn and Bacon 2002 The Internet Internet Service Providers (ISPs) Provide home users temporary connections to the Internet for a fee The ISP’s network is connected to the Internet and home users pay for a login to access the ISP network Some ISPs offer services beyond just access such as shopping, news, email, etc.

17. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Email Email on the Internet works like network email except that you can send and receive mail from beyond your own WAN To direct email to the right network and the right person, you use a combination of login name at network name, for example jsmith@bizness.com jsmith@bizness.com Email address differ from URLs

18. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Conferences Electronic bulletin boards that allow users to read messages from others and post messages for others to read One-to-many communication May be public or private Discussions are usually threaded so a single line of conversation can be followed through all responses

19. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Listservs Electronic automated mailing lists that delivers messages to all subscribers May have a moderator to manage and approve mail messages before sending to all subscribers Unlike conferences that must be visited to use, listserv messages appear in subscriber’s email boxes

20. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Chats Real-time conversations via the Internet Communication may be via typing, voice, or may include still or video images Chat rooms (virtual chat space) may be public or private Require prior appointments since chats are synchronous

21. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Telephony Voice conversations via the Internet Uses computer speaker and microphone as a telephone handset Telephony software dials and sets up communication among users Local calls to ISPs may enable long distance connections

22. Teaching and Learning with Technology  Allyn and Bacon 2002 Internet Communications Videoconferencing Audio and video conversations via the Internet Uses monitor-top video cameras along with computer speaker and microphone Depending on bandwidth available, provides for real-time live video interaction among users

23. Teaching and Learning with Technology  Allyn and Bacon 2002 Other Internet Services File Transfer Protocol (FTP) Software that allows users to upload (send files to the Internet) and download (receive files from the Internet) FTP Sites are virtual libraries of downloadable files Files are usually compressed (zipped) for faster transmission and must be unzipped before using

24. Teaching and Learning with Technology  Allyn and Bacon 2002 Other Internet Services Usenet Newsgroups are conferences dedicated to a particular topic of interest Usenet is the collection of on-going newsgroups Newsreader programs that let you participate in a newsgroup are built into most Internet software

25. Teaching and Learning with Technology  Allyn and Bacon 2002 Teaching and the Internet The world knowledge base is now available in any classroom that can connect to the Internet The Internet makes global communication for learning possible Students and teachers can participate in virtual learning communities across nations