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Chapter 6 Wireless LAN

Chapter 6 Wireless LAN. srnpisey@gmail.com. 1 Introduction to Wireless LAN .

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Chapter 6 Wireless LAN

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  1. Chapter 6 Wireless LAN srnpisey@gmail.com

  2. 1 Introduction to Wireless LAN • នៅក្នុងមេរៀនមុនយើងបានសិក្សាអំពីការដំឡើងប្រព័ន្ធNetworkដោយប្រើខែ្សសំរាប់ធ្វើការដោះដូរResource។ មានន័យថាក្នុងការដោះដូរ​Resource​ឧបករណ៍ទាំងអស់ត្រូវតែតភ្ជាប់ ទៅវិញទៅមក។ក្នុងជំពូកនេះអ្នកនិងសិក្សាអំពីការដោះដូរResource​ដោយមិនបាច់ប្រើខែ្សទេ។ នោះគឺការប្រើ Wireless LAN​ ហើយនិងសិក្សាអំពីតើ Wireless វានិងធ្វើការដោះដូរនិង​ អាចចែកចាយResource យ៉ាងដូចម្តេច?​ហើយនិងសិក្សាអំពីការ Configure Wireless LAN និងសិក្សាអំពីHardware Components។

  3. Wireless Router or Wireless Access Point • សម្រាប់​ Access Point​ គឺសុទ្ធតែជាវិធីសាស្រា្តដ៍ល្អប្រសើរក្នុងការ Extend Wireless Network របស់អ្នក។និងម្យ៉ាងទៀតនោះគឺដើម្បីធ្វើការភ្ជាប់ទៅកាន់ Exiting Wired Network មានន័យថាAccess Point អនុញ្ញាត្តWireless Client អាចធ្វើការទំនាក់ទំនងជាមួយនិង Wired LAN​រឺដើម្បីធ្វើការ Share Broadband Modem។

  4. Major manufacturers • 3Com • Apple Inc. • Asus • Belkin • Buffalo Technology • D-Link • Linksys • Motorola • Netgear • Mikrotik • Steele Inc. • TP-Link • ZyXEL Communications Corp.

  5. 3. Wireless PCMCIA Cared for Notebook Users • អ្នកទាំងអស់គ្នាប្រាកដជាបានប្រើរួចហើយនៅ Network Wireless នៅតាមផ្ទះ នៅតាម ហាង Coffee និងនៅតាមសាលារៀន។ តើអ្នកទាំងអស់គ្នាដែលធ្វើការសំគាល់ទេថា ? • តើ Hardware Components អ្វីដែលអាចអោយយើងអាចដំណើការ​ Wirelessly access the local network or Internet? • ឧបករណ៍ដែលអាចអោយ Client Station មានសម្ថតិភាពអាចធ្វើការ បញ្ជូននិងទទួល​ RF Signal គឺជា Wireless NIC។វាមិនដូចជា Ethernet NIC ទេព្រោះថា Wireless NIC គឺមានបញ្ជូលនៅ Modulation Technique ដែលអាចបំលែង Data Stream ទៅជា RF signal​ ។ • Wireless NIC ភាគច្រើនបានភ្ជាប់មកស្រាប់ជាមួយនិង Mobile Device ,Laptop Computer។ នៅក្នុងឆ្នាំ​១៩៩០ Wireless NIC សំរាប់ Laptops ត្រូវបានប្រើជា Slot គឺប្រភេទ​ PCMCIA slot ​និងឯង។

  6. Personal Computer Memory Card International Association • PCMCIA Wireless NIC ជាប្រភេទឧបករណ៍ដែលពេញនិយមដោយសាវាមានរូបរាងតូច និងងាយស្រួល Install ហើយគេមិនប្រើជាមួយប្រភេទ Desktop Computer ទេគឺគេប្រើ​ជាមួយ​Computer Laptop។

  7. 4. USB Wireless Adapter • ចំពោះការភ្ជាប់ Desktop ទៅកាន់ 802.11b Network ជំរើសដ៍ល្អបំផុតរបស់លោកអ្នកគឺ USB(Universal Serial Bus) សម្រាប់ Network Adapter វាមានតំលៃថ្លៃតែងាយស្រួលក្នុងការដំ ឡើងយ៉ាងណាមិញចំពោះកុំព្យូទ័រដែលប្រើប្រាស់នៅប្រព័ន្ធប្រត្តិបត្តិការ Window 98 រឺ Version ក្រោយនេះៗលោកអ្នកត្រូវតែមានUSB port ពីរ Port នោះដែរគឺជា Hot-swappableដែលមាន ន័យថាលោកអ្នកអាចធ្វើការ Plug វាដោយមិនចាំបាច់ Restart Computer នោះទេ។

  8. Configure Tenda Wireless Router.

  9. Configure Tenda Wireless Router. • System Status : ផ្នែកនេះគឺដើម្បីជួយអ្នកឱ្យយល់ពីNetwork, Service and System Status។អ្នកអាចចុចប៊ូតុង“Refresh" ដើម្បីទទួលបានការupdated information of the router

  10. Setup Wizard : • សំរាប់ការConfigure internet សំរាប់ការប្រើប្រាស់មានពីប្រភេទ គឺ​ setup wizard and manual configuration. • មាន ៥ ប្រភេទនៃ Internet connection​ Mood : ​ Static IP, Dynamic IP, PPPOE, L2TP, PPTP.

  11. Advance Setting • Advance Setting : • MAC Address: The device's MAC address as seen on your local network. • IP Address: The device's IP address as seen on your local network(192.168.0.1 by default). • Subnet Mask: It is shown the device's subnet mask here (255.255.255.0 by default) • Advance Setting • LAN Setting • WAN Setting • MAC Address Clone • DNS Seting

  12. LAN Setting

  13. WAN Setting: • PPPoE:​Some ISP use PPPoE (Point-to-Point Protocol over Ethernet) to construct the Internet connections for end users. You can enquire your ISP to see if they use PPPoE. If they do, you can configure it. • Account and Password:​​Enter them provided by your ISP • Service Name:​Enter the service name if provided. • Connect Automatically:​Connect automatically to the Internet after booting the system or connection failure. • Connect Manually:​Connect to the Internet by the user manually. • Connect on Demand:​Re-establish your connection to the Internet after the specific time (Max Idle Time). Zero means your Internet connection at all time. Otherwise, enter the minutes to be elapsed before you want to disconnect the Internet access. • Connect on Fixed Time:​Connect to the Internet during the time you fix

  14. MAC(media access control)Address Clone • MAC Address clone:​Some Internet service providers require end-user's MAC address to access their network. This feature copies the MAC address of your network device to the router. • MAC Address:​The MAC address to be registered with your Internet service provider. • Restore Default MAC:​Restore the default hardware MAC address. • Clone MAC:​Register your PC's MAC address.

  15. DNS Setting

  16. Basic Setting • In this section you can only configure the wireless parameters such as SSID and Channel. • SSID(service set identifier): the wireless network public name. The SSID is a must to enter • SSID Broadcast: When the wireless client will search out wireless network, they would detect the SSID broadcast around. If one is selected, the Router will broadcast its own SSID to all wireless hosts. • Channel: Select one from 1~13 channels or AutoSelect. As far as possible select the channel which is used less for preventing signal interference. • Extension Channel: It can be used to ensure 11N network frequency.

  17. Security Setting

  18. Security Setting (con) • WEP Key(Wired Equivalent Privacy): either ASCII (5~13 ASCII characters except / , and other illegal characters. ) or Hex legal characters (10~26 Hex characters.) • WPA/WPA2-Personal​(Wi-Fi Protected Access): you can enable personal or mix mode, but you must make sure that the wireless client also supports the selected encryption method. 

  19. DHCP Server • DHCP (Dynamic Host Configuration Protocol) is to assign an IP address to the computers on the LAN/private network. When you enable the DHCP Server, the DHCP Server will allocate automatically an unused IP address from the IP address pool to the requesting computer in premise of activating “Obtain an IP Address Automatically”. So specifying the starting and ending address of the IP Address pool is needed. The lease time is the length of the IP address lease.

  20. DHCP Server

  21. DHCP server List

  22. Reboot • Rebooting the router is to make the settings configured go into effect or to set the router again if setting failure happens

  23. Client Configuration

  24. របៀបមើល Password និងប្រភេទ Security របស់ Wireless ដែលយើងបានភ្ជាប់

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