Wireless Networks (WLAN)

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Wireless Networks(WLAN)

• BY Priscilla Solis
• Ibrahima Diallo
• Dania Ibrahim
• Alma Garrido
• Erik Torres

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What is wireless networking?

• Technically, wireless networking refers to any
  data exchange between PCs and other devices which
  doesnt involve cables.
• Connecting to a wireless hotspot in a cafe,
  sending data from your PC to a handheld computer
  using an infrared link, or synching data between
  your mobile phone and notebook via Bluetooth are
  all examples of wireless networking.

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Wireless Networking-continue

• Although any technology that does this could be
  called wireless networking, the term generally
  refers to wireless LANs (WLAN). A WLAN is a
  grouping of network components connected by
  electromagnetic (radio) waves instead of cables.
• A wireless LAN basically consists of the network
  backbone end-user devices suchas data
  collection units, handheld computers and laptops
  wireless LAN access points wireless cards and
  software that will help you manage the network.

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Wireless Network-continue

• The history of wireless networking was over fifty
  years ago, during World War II, when the United
  States Army first used radio signals for data
  transmission. They developed a radio data
  transmission technology, which was heavily
  encrypted.
• This inspired a group of researchers in 1971 at
  the University of Hawaii to create the first
  packet based radio communications network. Named
  ALOHNET, was the very first wireless local area
  network (WLAN).

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Wireless Network-continue

• This first WLAN consisted of 7 computers that
  communicated in a bi-directional star topology
  (see http//www.its.bldrdoc.gov/fs-1037/ and
  http//www.webopedia.com/ -- both are excellent
  sources of computer and telecommunication terms
  and definitions) that spanned four of the
  Hawaiian Islands.
• With the central computer based on Oahu Island.
  With this, wireless networking was born.

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Wireless Networking-continue

• While wired LANs have wholly dominated the
  networking market, the last few years show a rise
  in wireless networking usage.
• This can best be seen in academic circles (i.e.
  University campuses), health-care, manufacturing,
  and warehousing. All the while, the technology is
  improving, making it easier and cheaper from
  companies to go wireless.

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Wireless Setup

• How to setup a wireless home Network?

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Wireless Networking-steps

• Install the adapter according to the
  manufacturer's instructions. (If you are using a
  PCI adapter, you'll have to turn off the
  computer, open the casing, insert the adapter
  into a free PCI slot, and restart the computer.)
• Windows will detect the adapter and prompt you to
  install the driver on the included CD-ROM.

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Wireless Networking steps-continue

• Install the network software that usually comes
  with the hardware. You will be prompted for the
  computer's name, and asked if the current
  computer is meant to be the server or client for
  Internet access.
• Restart the computer.

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Wireless Networking steps-continue

• Now you have to create a profile--the collection
  of settings that let you use the network. You can
  have several different profiles, so that if you
  take your laptop to the office or the local
  networked coffee house, you have only to switch
  profiles to instantly connect to their network.
  To create a profile, run the configuration
  program that's part of the network software.
• Set the mode to ad hoc (the mode may be set as
  peer-to-peer) if you're not using an access
  point, or infrastructure if you are.

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Wireless Networking steps-continue

• Enter the network name.
• If you're using an ad hoc network, set the
  channel (a number from 1 to 11). All adapters on
  a network must use the same channel. (With an
  infrastructure network, the client automatically
  configures itself to the channel with the
  strongest signal.)

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Wireless Networking steps-continue

• Enter your encryption key--a series of letters
  and numbers, like a password--according to the
  vendor's instructions.
• What are you waiting for? Grab your notebook,
  head out to the veranda, and check your e-mail.

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Trouble Shooting

• Trouble shooting means to poke around a computers
  data system looking for things out of order.
• A few steps to follow
• Consult your product vendors for support or your
  help desk representative.
• Read the literature that came with the software
  or peripheral.

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Trouble Shooting-continue

• If you change something and it does not solve the
  problem change it back. You do not want to make
  your problems worse.
• Take one step at a time and document everything
  so you can undo everything if necessary.
• Visit the vendors website to see if there is any
  information on that product and how to trouble
  shoot problems with it, apply any patch available
  to resolve your problem. With Microsoft products
  most times you can install a service pack or
  patch and your problems will be resolved.

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Material List

• Accesses point
• Antenna
• Ethernet Card
• Wireless Router
• Ethernet Switch

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Top Sellers Access Points

• 54 Mbps 802.11g
• 19.99
• NETGEAR
• Instant Wireless WAP11, 802.11b
• 59.99
• Linksys

• Dual-Band Wireless AG 808.11a,b,g
• 169.99
• Linksys
• WA840G 802.11g
• 69.99
• Motorola

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54 Mbps Wireless Access Point, 802.11g

• Works with both IEEE 802.11b draft 802.11g
  (both 2.4 GHz)
• Speeds of up to 54 Mbps
• Office roaming for notebook PC users
• Shared broadband Internet access and resources
• 128-bit WEP encryption
• Radio Frequency
• Manufacturer NETGEAR

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Instant Wireless

• High-Speed Transfer Rate of Up to 11 Mbps
• Interoperable with IEEE 802.11b (DSSS)
  2.4GHzcompliant Equipment
• Provides Roaming, Best Access Point Selection,
  Load Balancing, and Network Traffic Filtering
• Long Operating Range Supports 150m (indoor) and
  500m (outdoor)
• Adjustable Antennas Provide for Physical
  Configuration
• Wireless Access Point Roaming and Bridging
• MAC Address Filtering, IP Filtering, DHCP Client,
  and SNMP Configuration Utility Password
  Protection
• 128-bit Hardware WEP Supported
• Compatible with Virtually All Major Operating
  Systems
• Manufacturer Linksys

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Access Point

• Access Point, Bridge and Repeater.
• Coverage area100m (inside) 300m (outside)
• Modulation Direct Sequence Spread Spectrum
• Speed Options Data rate selection
  (11M/5.5M/2M/1M)
• RF Output Power 23dBm (200mW) and 13 dBm

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Top Seller Antennas

• Powerline 54Mbps Wall-Plugged
• 99.99
• NETGEAR
• Wifi Locator-Wifi Signal Detector, 802.11b,g
• 9.99
• Hawking Technology

• High Gain Antenna kit for TNC Connectors
• 69.99
• Linksys
• AirPlus G High Speed 2.4GHZ, 802.11g,b
• 79.99
• D-Link

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AirPlus G

• Maximum wireless signal rate based on IEEE
  Standard 802.11g specifications
• LEDS Power, LAN, WLAN
• Encryption Security 64 bit WEP 128 bit WEP.
• Maximum Data Rate 54 Mbps

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Ethernet Card

• 6700G Plug Share Wireless Notebook Adapter,
  802.11g
• Features
• 54 Mbps data transmission speed
• Interoperates with all 802.11b or g compliant
  devices
• WEP Encryption
• Wireless protocol 802.11g

• Radio Frequency 2.4Ghz
• 9.99

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NIC Card

• Frequency Range 24122484 MHz
• Modulation Direct Sequence Spread Spectrum
• Data Rate 11, 5.5, 2 or 1 Mbps, auto-select
• Channels US 11

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Wireless Routers

• 6800G Plug Share Wireless Router, 802.11g
• 19.99
• Manufacturer ATT

• 6850G, 802.11g Wireless Router
• 29.99
• ATT
• Connect at speed up to 108 Mbps

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6800G Plug Share Wireless Router

• Connect at speeds up to 54 Mbps
• Stay online and connected to your network from
  room to room in your home or office
• Avoid the expense of structured wired
  installations
• Four RJ-45 compatible LAN Ports
• One RJ-45 compatible WAN Port
• Integrated firewall with VPN pass-through
• WEP Encryption

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Switch

• Transmission Half/full-duplex, 10/100Mbps is
  auto-negotiation for STP
• Up-link port Independent port
• Max. Forwarding rate 148,800 packets per second

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5-port Fast Ethernet Switch

• 9.99
• Manufacturer NETGEAR
• Plug Play installation, no configuration
• Auto-detects speed and duplex
• 100 Mbps access/200 Mbps in full-duplex
• Vertical option saves space on your desk

• Designed specifically for home and small office
  users with rear ports that reduce cable clutter,
  and front status lights for easy monitoring.

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Wireless Security

• Disadvantage-It is easier for a hacker to access
  a network that is wireless than a network that is
  cabled.
• Solution-WEP (Wired Equivalent Privacy) encrypts
  data sent over a wireless network. To gain access
  you must know the network name (SSID) and have a
  password for the network. The SSID and passwords
  are usually changed.
• More advanced system is WPA (Wi-Fi Protected
  Access) which provides individual users
  authentication as well more secure encryption.
  Note only effective if support is built into the
  operating system (Windows XP), anything earlier
  is not compatible.

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ConclusionFuture of Wireless Networks

• Increased use of laptop computers within the
  enterprise, and increase in worker mobility have
  fuelled the demand for wireless networks. Note
  that like any other technology, there are
  challenges associated with the use of WLANs But
  with the maturing of industry standards and the
  deployment of lightweight wireless networking
  hardware across a broad market section, wireless
  technology has come of age.The technology no
  doubt has witnessed increased acceptance in the
  last few years not only within the enterprise,
  but also within the home, public access, and
  embedded device markets. This is made possible
  not only by improvements in performance and
  manageability but also security and
  interoperability as well and thegeneral decrease
  in price.

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Works Cited

• http//netsecurity.about.com/od/hackertools/a/aa07
  2004b.htm
• http//www.pcworld.idg.com.au/index.php/id1395397
  229
• http//www.computerworld.com/mobiletopics/mobile/s
  tory/0,10801,86951,00.html
• http//vvmicrosystems.com/education.html