Teaching and Learning with Technology

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Teaching and Learning with Technology

• Chapter 7
• Networks and the Internet
• by
• La Tisha Jenkins

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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

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• 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

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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

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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

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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

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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

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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

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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(equipmen
  t)
• Allows monitoring and access to costly equipment

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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 communication between students, teachers,
  and parents

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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

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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

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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, email, etc.

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Internet Communications

• Email-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

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Internet Communications

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

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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

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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