DEFINISI WIRELESS LAN - Universiti Kebangsaan Malaysia

DEFINISI WIRELESS LAN - Universiti Kebangsaan Malaysia

WIRELESS LAN Sistem komunikasi data yang fleksibel Alternatif kepada teknologi LAN yang menghubungkan bangunan atau kampus. WLAN menghantar dan menerima data melalui udara menggunakan gelombang elektromagnetik/ frekuensi radio Pilihan teknologi WLAN

Spread-Sprectrum Technology (SST) 1. 2. Direct Sequence Spread Spectrum (DSSS) Frequency Hopping Spread Spectrum (FHSS)

Narrowband Technology - Hantar dan terima maklumat pengguna dalam frekuensi radio yang specifik. Infrared Technology - Menggunakan frekuensi yang sangat tinggi untuk membawa data. KONFIGURASI WLAN

Independent WLAN (peer-to peer) Yg paling mudah Menggunakan wireless adapter Tidak memerlukan pentadbiran atau pra-konfigurasi Infrastruktur WLAN

Multiple Access point (MAP) menghubungkan WLAN dengan rangkaian berwayar. Bebrapa pengguna berkongsi sumber di rangkaian Liputan yang lebih luas APLIKASI Di hospital lebih produktif Consulting / Akaun meningkatkan produktiviti

Pelajar-pelajar universiti mudah capai maklumat Pekerja gudang tukar maklumat di pusat pangkalan data Frekuensi WLAN 10 MHz hingga 300MHz Luas Liputan 500 Kaki ( dalam bangunan ) 1000 Kaki ( Luar bangunan ) Keperluan rangkaian:

Hardware Access point Antennas and bridges Wireless adapter Oleh kerana WLAN mempunyai tahap fleksibiliti yang sangat tinggi, maka capaian data melalui rangkaian adalah sangat mudah.

KELEBIHAN DAN KEKURANGAN KELEBIHAN pemasangan wayar untuk LAN tidak lagi diperlukan pekerja akan menjadi lebih produktif Penjimatan kos Kebolehlarasan kepelbagaian topologi

membolehkan aplikasi dan instalisasi tertentu digabungkankan apabila diperlukan. KELEBIHAN DAN KEKURANGAN KELEMAHAN Pengguna berada diluar kawasan yang tidak ada langsung liputan dan penyiaran sel. Keselamatan dari penggodam untuk kedua-dua pembekal dan pengguna.

Jaringan tanpa wayar masih berdasarkan media pengangkutan narrowband. Pengendali jaringan tanpa wayar masih memerlukan penyelesaian pengangkutan yang optima supaya pelanggan dapat perkhidmatan yang optima dan bandwidth yang sama. SEKIAN TERIMA KASIH.

Independent WLAN Independent WLAN Extended-Range Independent WLAN Using Access Point as Repeater Infrastructure WLAN Infrastructure WLAN Handing off the WLAN

Connection Between Access Points

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