Teaching and Learning with Technology Chapter 7 Networks and the Internet by La Tisha Jenkins

Networking Basics Networks 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 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

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

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

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

Using a Network Networked Programs-Advantages The programs can be installed on the server and used by all workstations Programs on servers are easier to install and maintain Requires less hard drive space of individual workstations

Using a Network-Sharing Data Every user is 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 where it could be used by others

Using a Network-Hardware Sharing Allows printers, scanners, or other hardware devices to be shared among multiple workstations Saves on the cost of multiple peripherals(equipment) Allows monitoring and access to costly equipment

Using a Network- Communications is a software program included in most networked environments allows users on a network to send and receive electronic messages with attachments Offers communication between students, teachers, and parents

Telecommunications Telecommunications refers to electronic communications between computers via phone lines When not directly connected to a network, telecommunications offers an alternate connection Modems are necessary to convert signal from digital to analog so that they can be carried on phone lines

Telecommunications-Modem Varies in speed of transmission May be internal and external Requires telecommunication software to set them up and control transmission Networks include multiple modems for home use

The Internet-Internet Service Providers (ISPs) A collection of interconnected individual networks Provides home users temporary connections to the internet for a fee Some ISPs offer more services than just access such as shopping, news, , etc.

Internet Communications - sending and receiving mail from all over Conferences-electronic bulletin boards that allow users to read messages from others and post messages for others to read Listservs -electronic automated mailing lists that delivers messages to all subscribers Chats -real-time conversations via the Internet

Internet Communications Telephony -voice conversations via the Internet Videoconferencing -audio and video conversations via the Internet

More Internet Services File Transfer Protocol (FTP)-software that allows users to upload and download from the Usenet- newsgroups are conferences dedicated to a particular topic of interest

Always remember…. 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