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Welcome
Topic
Anika Ohab ID:142-15-3568
Umme Habiba ID: 142-15-3677
Abul HasnathID:142-15-3532
Shahinur Rahman ID: 142-15-3606
Members
Introduction
Defination
Types
configuration
Advantage & Dis-Advantage
Application
Contents
A WIRELESS LOCAL AREA NETWORK(LAN) IS A FLEXIBLE
DATA COMMUNICATIONS SYSTEM IMPLEMENTED AS AN
EXTENSION TO, OR AS AN ALTER...
• The wireless LAN connects to a wired
LAN
• There is a need of an access point that
bridges wireless LAN traffic into the...
HOW WIRELESS LANS WORKS:
Wireless LANs operate in almost the same way as wired LANs, using the same networking
protocols a...
COMPONENTS OF WIRELESS
ARCHITECTURE:
Wireless LAN Architecture Is Composed Of Different Components Which Help In
Establish...
Access Points:A Special Type Of Routing Device That Is Used To Transmit The
Data Between Wired And Wireless Networking Dev...
HOW TO CONFIGURE WIRELESS LANS
• FIVE WAYS TO CONFIGURE A WIRELESS LAN
• PEER-TO-PEER NETWORK
• CLIENT AND ACCESS POINT
• ...
A BASIC WIRELESS PEER TO PEER
NETWORK
• Two Pcs Equipped With Wireless Adapter
Cards Can Be Set Up As An Independent
Netwo...
IEEE 802.11 WIRELESS LAN STANDARD
• In Response To Lacking Standards, IEEE Developed The First Internationally
Recognized ...
802.11 Networks Can Be Used In Two
Modes:
1. Infrastructure And
2. Ad Hoc Mode
Types
Infrastructure Mode Requires
A Centra...
MAC Layer Covers Three
Functional Areas:
IEEE 802.11 Medium Access Control:
MAC
1.Reliable Data
Delivery
2.Access
Control
...
When Employing Wireless Transmission, This Has The
Disadvantage That It Is Relatively Easy To Listen In To Any
Data Transf...
• WI-FI OR WIFI Is A Technology That Allows Electronic Devices To Connect To
A Wireless LAN (WLAN) Network.
• The Range Of...
FUTURE OF WLAN:
• WLANS MOVE TO MATURITY
• HIGHER SPEEDS
• IMPROVED SECURITY
• BETTER ERROR CONTROL
• LONG DISTANCES
• NEW...
Mobility:The Primary Advantage Of Wireless Technology.
Having This Freedom Of Being Able To Move Around
Without Wires Bein...
Speedier Disaster Recovery :If Primary Operations Go Down, Having A
WLAN Makes Life Easier. Allowing Ability For Network T...
DISADVANTAGE OF WLAN
1.HEALTH RISK
• Being A Health Risk Is A Ongoing Issue. Wireless Devices Emit Low Levels Of
RF. It Is...
WIRELESS LAN APPLICATIONS:
•
MEDICAL PROFESSIONALS
CORPORATE
EDUCATION
TEMPORARY SITUATIONS
AIRLINES
SECURITY STAFF
...
WLAN of networking.ppt
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WLAN of networking.ppt

  1. 1. Welcome
  2. 2. Topic
  3. 3. Anika Ohab ID:142-15-3568 Umme Habiba ID: 142-15-3677 Abul HasnathID:142-15-3532 Shahinur Rahman ID: 142-15-3606 Members
  4. 4. Introduction Defination Types configuration Advantage & Dis-Advantage Application Contents
  5. 5. A WIRELESS LOCAL AREA NETWORK(LAN) IS A FLEXIBLE DATA COMMUNICATIONS SYSTEM IMPLEMENTED AS AN EXTENSION TO, OR AS AN ALTERNATIVE FOR, A WIRED LAN. • A wireless LAN or WLAN is a wireless local area network that uses radio waves as its carrier. • The last link with the users is wireless, to give a network connection to all users in a building or campus. • The backbone network usually uses cables What??
  6. 6. • The wireless LAN connects to a wired LAN • There is a need of an access point that bridges wireless LAN traffic into the wired LAN. • The access point (ap) can also act as a repeater for wireless nodes, effectively doubling the maximum possible distance between nodes. Topologie s
  7. 7. HOW WIRELESS LANS WORKS: Wireless LANs operate in almost the same way as wired LANs, using the same networking protocols and supporting the most of the same applications. Works
  8. 8. COMPONENTS OF WIRELESS ARCHITECTURE: Wireless LAN Architecture Is Composed Of Different Components Which Help In Establishing The Local Area Network Between Different Operating Systems. These Components Are Very Essential For Wi-fi Architecture. • Access Point • Clients • Bridge
  9. 9. Access Points:A Special Type Of Routing Device That Is Used To Transmit The Data Between Wired And Wireless Networking Device Is Called As AP. Clients:Any Kind Of Device Such As Personal Computers, Note Books, Or Any Kind Of Mobile Devices Which Are Inter Linked With Wireless Network Area Referred As A Client Of Wireless LAN Architecture. Bridge:A Special Type Of Connectors Which Is Used To Establish Connections Between Wired Network Devices Such As Ethernet And Different Wireless Networks Such As Wireless LAN. It Is Called As Bridge. .
  10. 10. HOW TO CONFIGURE WIRELESS LANS • FIVE WAYS TO CONFIGURE A WIRELESS LAN • PEER-TO-PEER NETWORK • CLIENT AND ACCESS POINT • MULTIPLE ACCESS POINTS AND ROAMING • USING AN EXTENSION POINT • USING A DIRECTIONAL ANTENNA
  11. 11. A BASIC WIRELESS PEER TO PEER NETWORK • Two Pcs Equipped With Wireless Adapter Cards Can Be Set Up As An Independent Network Whenever They Are Within Range Of One Another. Requires no administration or configuration. Each client has access to only the resources shared by the other client and not to a central server.
  12. 12. IEEE 802.11 WIRELESS LAN STANDARD • In Response To Lacking Standards, IEEE Developed The First Internationally Recognized Wireless LAN Standard – IEEE 802.11 • IEEE Published 802.11 In 1997, After Seven Years Of Work • Most Prominent Specification For WLANS • Scope Of IEEE 802.11 Is Limited To Physical And Data Link Layers.
  13. 13. 802.11 Networks Can Be Used In Two Modes: 1. Infrastructure And 2. Ad Hoc Mode Types Infrastructure Mode Requires A Central Access Point That All Devices Connect To. Ad-hoc Mode Is Also Known As “Peer-to-peer” Mode. Ad-hoc Networks Don't Require A Centralized Access Point. Instead, Devices On The Wireless Network Connect Directly To Each
  14. 14. MAC Layer Covers Three Functional Areas: IEEE 802.11 Medium Access Control: MAC 1.Reliable Data Delivery 2.Access Control 3.Security
  15. 15. When Employing Wireless Transmission, This Has The Disadvantage That It Is Relatively Easy To Listen In To Any Data Transferred. This Is Why We Need To Be Encrypted. There Are Different Encryption Methods In Existence. ENCRYPTION WEP Wired Equivalent Privacy was the first encryption key protocol. • it is no longer considered safe and is relatively easy to hack. • This is why we should no longer use it. WPA WiFi Protected Access has been developed from the WEP protocol. • Improved security mechanisms provide better protection. • a dynamic key was introduced for the purpose of transfers. WPA2 WPA2 builds on WPA But employs the strong AES algorithm to encode the data transfer.
  16. 16. • WI-FI OR WIFI Is A Technology That Allows Electronic Devices To Connect To A Wireless LAN (WLAN) Network. • The Range Of A Residential Wi-fi Network Depends On 1.The Wireless Access Point (WAP) Or Wireless Router 2.Its' Antenna(s) Sensitivity, As Well As 3.The Exact 802.11 Standard Being Used Range A general rule of thumb in home networking says that 802.11b/g WAPs and routers support a range of up to 150 feet (46 m) indoors and 300 feet (92 m) outdoors. Another rule of thumb holds that the effective range of 802.11a is approximately one-third that of 802.11b/g. Obstructions in home such as brick walls and metal frames or siding can greatly reduce the range of a Wi-Fi LAN by 25% or more.
  17. 17. FUTURE OF WLAN: • WLANS MOVE TO MATURITY • HIGHER SPEEDS • IMPROVED SECURITY • BETTER ERROR CONTROL • LONG DISTANCES • NEW VENDORS • GLOBAL NETWORKING ANYWHERE, ANYTIME, ANY-FORM CONNECTIVITY… Future!
  18. 18. Mobility:The Primary Advantage Of Wireless Technology. Having This Freedom Of Being Able To Move Around Without Wires Being Connected. Ease And Cost Of Installation :Need To Have To Run Cables Through Walls And Ceilings Is Eliminated With A Wireless LAN. Easier Network Modifications Increased Network Reliability :One Of The Most Common Network Problems Is Having Cable Failures. Advantag e
  19. 19. Speedier Disaster Recovery :If Primary Operations Go Down, Having A WLAN Makes Life Easier. Allowing Ability For Network To Be Up And Running So Fast Without Business Being Significantly Disturbed. Radio Signal Interference :wireless Devices Operate In The Same Radio Frequency As Other Devices. Signals From Other Devices Can Disrupt Wireless Transmissions, Or A WLAN Device Can Interfere With Other Devices. Security :the Wireless Signal Is Broadcast In Open Air Making Security A Big Concern. Security Has Improved For WLAN But It Remains A Major Issue And Must Be Properly Addressed.
  20. 20. DISADVANTAGE OF WLAN 1.HEALTH RISK • Being A Health Risk Is A Ongoing Issue. Wireless Devices Emit Low Levels Of RF. It Is A Know Fact That High Levels Of RF With Heating Effects Can Cause Biological Damage. 2.COSTWireless Network Cards Cost 4 Times More Than Wired Network Cards. • The Access Points Are More Expensive Than Hubs And Wires. 3.SIGNAL BLEED OVER • Access Points Pick Up The Signals Of Adjacent Access Points Or Overpower Their Signal. 4.ENVIRONMENTAL CONDITIONS • Susceptible To Weather And Solar Activity. • Constrained By Buildings, Trees, Terrain.
  21. 21. WIRELESS LAN APPLICATIONS: • MEDICAL PROFESSIONALS CORPORATE EDUCATION TEMPORARY SITUATIONS AIRLINES SECURITY STAFF EMERGENCY CENTERS Applicatio ns

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