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Vanessa Martinez-ortiz

Sep05_article04 - 0 views

itdl.org/...article04.htm

wctafcp11c wireless_connectivity

shared by Vanessa Martinez-ortiz on 20 Feb 13 - No Cached
  • Technology has been the driving force to bring paradigm shifts in education. Big changes are not possible unless tools are available.
  • The major shift over from the second-generation (2G) to third-generation (3G) wireless or 4G mobile was the ability to support advanced and wideband multimedia services, including email, file transfers, and distribution services such as radio, TV and software provisioning (software download) which are very important to open and distance learning system.
  • User expectations are increasing with regards to a large variety of services and applications with different degrees of quality of services, which is related to delay, data rate and error bit requirements.
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  • Due to the dominant role of the IP based data traffic in the future networks, systems have to be designed for the economic data transfer rate. WMI requires the core wireless network infrastructure to change from circuit – to packet switched where voice and data are transported using IP as the common protocol.
  • The wireless mobile communication shall help in lowering costs of data communication, Multi vendor procurement, and witnessing a growth in modular and incremental infrastructure.
Vanessa Martinez-ortiz

Technical Overview of Wireless Networking - European University Institute - 0 views

www.eui.eu/...WiFiOverview.aspx

wctafcp11c wireless_connectivity

shared by Vanessa Martinez-ortiz on 20 Feb 13 - No Cached
  • This translates into a speed somewhat greater than can be obtained with a 56Kb/s modem, but notably slower than a direct LAN (i.e. wired) connection, which is always preferable when available.
  • If the client has the wrong key or no key, authentication will fail and the client will not be allowed to associate with the AP.
  • In the past couple years, the technology applied to wireless network security has taken enormous steps forward. Static WEP keys have shown themselves to be vulnerable to hacker attacks.
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  • This 802.1X-based solution provides scalable, centralised security management and supports dynamic per-user, per-session WEP encryption keys to protect the privacy of transmitted data.
  • LEAP is another EAP type in use today in WLANs. LEAP supports all of the 802.1X and EAP elements already mentioned.
Bobbi Tedesco

An Introduction to Wireless Networking (Part 1) - 802.11 Overview :: Wireless Networkin... - 1 views

www.windowsnetworking.com/...Wireless-Networking-Part1.html

wireless_connectivity wctafcp11C wctaflatclassroomproject overview

shared by Bobbi Tedesco on 20 Feb 13 - No Cached
  • Whether it’s because you have made a call using a mobile phone, received a message on your pager, checked your email from a PDA or even just seen an advert related to it, we have all come across a wireless data or voice network!
  • These types of networks can be maintained over large areas, such as cities or countries, via multiple satellite systems or antenna sites looked after by an ISP. These types of systems are referred to as 2G (2nd Generation) systems.
  • Wireless networking can prove to be very useful in public places – libraries, guest houses, hotels, cafeterias, and schools are all places where one might find wireless access to the Internet.
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  • This technology allows the connection of multiple networks in a metropolitan area such as different buildings in a city, which can be an alternative or backup to laying copper or fibre cabling.
  • A wireless networking system would rid of the downtime you would normally have in a wired network due to cable problems
  • Wired Equivalent Privacy is intended to stop the interception of radio frequency signals by unauthorized users and is most suitable for small networks.
  • Bluetooth is a simple type of wireless networking that allows the formation of a small network with up to eight devices being connected at once
  • Bluetooth falls under personal area networking since it is has a very short range – 30 to 300 feet.
  • The main features of Bluetooth are that unlike Infra Red, the signal is not affected by walls it uses radio technology, it is not very expensive, and has little power consumption.
Vanessa Martinez-ortiz

The Wireless Internet Opportunity For Developing Countries | infoDev.org - 0 views

www.infodev.org/...Publication.24.html

wctafcp11c wireless_connectivity

shared by Vanessa Martinez-ortiz on 20 Feb 13 - No Cached
  • The Wireless Internet Opportunity for Developing Countries examines the emergence and promise of proven and inexpensive technologies to bridge the connectivity gap at the root of the digital divide.
  • The promises of wireless Internet technologies have generated much interest on the part of the international-development community.
  • While in developed nations these technologies have primarily been associated with mobility applications and local area networking in homes and offices, their most intriguing application in developing nations is the deployment of low-cost broadband Internet infrastructure and lastmile distribution.
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  • Wireless Internet may be a very effective and inexpensive connectivity tool, but it does not carry any magic in itself.
  • It can only be successfully deployed as demand for connectivity and bandwidth emerges in support of relevant applications for the populations served.
  • These may be supporting e-government, e-education, e-health, e-business or e-agriculture applications. But those are not easily implemented in the developing world.
  • Demand aggregation for wireless Internet connectivity around applications that make sense in support of wireless infrastructure investment is the first important challenge that the UN ICT Task Force, infoDev, and the Wireless Internet Institute wanted to explore and document.
  • The authors of this compendium have investigated dozens of field experiments around the world and selected several that exemplify some of the innovative approaches to this challenge.
  • One common characteristic of these case studies is their unconventional, often grassroots origin. Entrepreneurs from the private, public, or not-for-profit sectors have independently developed original deployment models pointing to potential solutions for the developing world.
Rena Lee

What is Wifi? - 0 views

www.scambusters.org/wifi.html

wctafcp11c wctaflatclassroomproject wireless_connectivity

shared by Rena Lee on 20 Feb 13 - Cached
  • Rena Lee on 22 Feb 13
     
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