Site na Admin / 27 Ọkt 22 /0Okwu ONU's LAN (netwọọdụ mpaghara) Kedu ihe bụ LAN? LAN pụtara Netwọk Mpaghara Mpaghara. LAN na-anọchi anya ngalaba mgbasa ozi, nke pụtara na ndị niile so na LAN ga-enweta ngwugwu mgbasa ozi nke onye ọ bụla zitere. Ndị otu LAN nwere ike ịkparịta ụka ma nwee ike hazie ụzọ nke ha maka kọmpụta sitere na ndị ọrụ dị iche iche ịgwa onye ọ bụla okwu. GỤKWUO Site na Admin / 26 Ọkt 22 /0Okwu WLAN Data Njikọ Layer A na-eji oyi akwa njikọ data nke WLAN dị ka oyi akwa isi maka nnyefe data. Iji ghọta WLAN, ịkwesịrị ịma ya nke ọma. Site na nkọwa ndị a: Na protocol nke IEEE 802.11, MAC sublayer nwere usoro ịnweta mgbasa ozi nke DCF na PCF: Pụtara DCF: Kesaa... GỤKWUO Site na Admin / 25 Ọkt 22 /0Okwu WLAN anụ ahụ oyi akwa PHY PHY, oyi akwa anụ ahụ nke IEEE 802.11, nwere akụkọ ihe mere eme nke mmepe teknụzụ na ụkpụrụ teknụzụ: IEEE 802 (1997) teknụzụ mgbanwe: nnyefe infrared nke FHSS na DSSS bandwit na-arụ ọrụ: na-arụ ọrụ na bandwit ugboro 2.4GHz (2.42.4835GHz, 83.5MHZ na mkpokọta ... GỤKWUO Site na Admin / 24 Ọkt 22 /0Okwu Usoro WLAN Enwere ọtụtụ aha na-etinye aka na WLAN. Ọ bụrụ na ịchọrọ ịghọta nke ọma isi ihe ọmụma nke WLAN, ịkwesịrị ịme nkọwa ọkachamara zuru oke nke ihe ọmụma ọ bụla ka i wee ghọta ọdịnaya a n'ụzọ dị mfe n'ọdịnihu. Ọdụ (STA, maka mkpụmkpụ). 1). Ebe ọdụ (point), al... GỤKWUO Site na Admin / 23 Ọkt 22 /0Okwu Akụkọ ihe mere eme nke WLAN Enwere ike ịkọwa WLAN n'echiche sara mbara na n'echiche dị warara: Site n'echiche micro, anyị na-akọwapụta ma nyochaa WLAN n'echiche sara mbara ma dị warara. N'echiche sara mbara, WLAN bụ netwọk emere site na iji ebili mmiri redio dochie ụfọdụ ma ọ bụ niile nke wired mgbasa ozi LAN, dị ka infrared, l... GỤKWUO Site na Admin / 22 Ọkt 22 /0Okwu Otu kpakpando na Modulation dijitalụ Constellation bụ echiche bụ isi na mgbanwe dijitalụ. Mgbe anyị na-eziga akara dijitalụ, anyị anaghị ezipụ 0 ma ọ bụ 1 ozugbo, mana buru ụzọ mepụta otu akara 0 na 1 (bits) dịka otu ma ọ bụ ọtụtụ. Dịka ọmụmaatụ, ibe abụọ ọ bụla na-etolite otu, ya bụ, 00, 01, 10, na 11. Enwere steeti anọ ... GỤKWUO << < gara aga22232425262728Ọzọ >>> Peeji nke 25/76