Kodi LAN ndi chiyani?
LAN amatanthauza Local Area Network.
LAN imayimira malo owulutsa, zomwe zikutanthauza kuti mamembala onse a LAN alandila mapaketi owulutsa omwe amatumizidwa ndi membala aliyense.Mamembala a LAN amatha kulankhulana ndipo amatha kukhazikitsa njira zawozawo kuti makompyuta ochokera kwa ogwiritsa ntchito osiyanasiyana azilankhulana popanda kudutsa pa intaneti.
1) Mawonekedwe ofunikira kwambiri a LAN
Monga momwe tawonetsera pachithunzi pamwambapa, ndiye masanjidwe ofunikira kwambiri a LAN.Ngati pali zida zosiyanasiyana, muyenera kupeza adilesi ya MCA ya winayo.
Chitsanzo chatsatanetsatane: A amatumiza uthenga kwa C, koma A sakudziwa adilesi ya MAC ya C. Panthawiyi, kudzera mu protocol ya ARP (Address Resolution Protocol;) yang'anani adilesi ya IP ku zida zonse zolumikizidwa ndi hub.Atalandira kuwulutsa, C amabwezera adilesi ya MAC ku A, ndipo zida zina zimataya chidziwitsocho.Pakadali pano, zokonzekera zolumikizirana pakati pa zida zakhazikitsidwa.Zomwe zili pamwambapa zitha kuphweka motere: A - ARP protocol: imathetsa adilesi ya MAC ya IP yomwe mukufuna - C ibweza adilesi ya MAC ku.
Zipangizo zolumikizidwa pabwaloli zili mugawo lomwelo la mikangano komanso dera lowulutsa.Chifukwa pali chosinthira chimodzi chokha, malo otsutsana ndi malo owulutsa.Kumvetsetsa kosavuta kwa masanjidwe awa ndikuti chipangizo chimodzi chokha chingatumize chizindikiro pa nthawi ndi zida zina zimatha kulandira chizindikirocho.
2) Hub ndi chipangizo chosanjikiza chakuthupi, ndiye kuti, gawo loyamba la OSI.Amagwiritsidwa ntchito kwambiri kulandira, kubwezeretsa, kukulitsa, ndi kutumiza ma signature.Pamene awiri opotoka ndi optical fiber amagwiritsidwa ntchito potumiza zizindikiro, ndi kuwonjezeka kwa mtunda, zizindikirozo zidzafooketsa ndikuyambitsa kusokoneza.Kusokonekera kwa chizindikiro kudzachititsa kuti deta yotumizira isakhale yodziwika, ndipo pamapeto pake imayambitsa kusokonezeka kwa chizindikiro.Mothandizidwa ndi likulu, chizindikirocho chikhoza kuyenda kutali;Panthawi imodzimodziyo, malowa ali ndi zolumikizira zambiri, zomwe zimatha kuwonjezera kuchuluka kwa ma terminal ndi kukula kwa LAN.
Vuto: Zida zonse zomwe zili pamalo amodzi zimagawana bandwidth.Ngati kuchuluka kwa zidazo kuli kokulirapo, kungayambitse kusokonekera kwa maulalo ndipo, zikavuta kwambiri, mphepo yamkuntho yowulutsa.
Kupita patsogolo: Dera lalikulu la mikangano litha kugawidwa m'magawo angapo ang'onoang'ono ang'onoang'ono pogwiritsa ntchito chosinthira, chomwe chingachepetse kufalikira kwa dera la mikangano ndikuchepetsa kuchulukana kwa data.
Zomwe zili pamwambazi ndi kufotokozera kwa chidziwitso cha ONU LAN chobweretsedwa kwa inu ndi Shenzhen HDV Phoelectron Technology Co., Ltd. Shenzhen Haidiwei Optoelectronics Technology Co., Ltd.zida zoyankhulirana.