Thaum koj tab tom tshawb xyuas txhua qhov chaw lossis nplooj ntawv hauv Is Taws Nem, thaum nkag mus rau ntau qhov chaw, cov lus "502 yuam kev" yuav tshwm sim ntawm koj lub vijtsam saib. Hauv qhov no, koj tsis tuaj yeem qhib cov nplooj ntawv ntawm cov vev xaib, thiab koj tsis muaj sijhawm los saib thiab tshawb xyuas cov peev txheej ntawm lub vev xaib no. Raws li txoj cai, qhov kev ua yuam kev no tshwm sim vim qhov tseeb tias cov teeb meem raug kuaj pom hauv kev ua haujlwm ntawm servers, feem ntau yog DNS, npe lossis hosting server uas lub vev xaib tam sim no nkag tsis tau.
Kev qhia "yuam kev 502 lub rooj vag tsis zoo" tuaj yeem txhais tau tias "qhov rooj tsis raug". Qhov no yuav txhais tau tias qhov browser (Internet browser) ntawm koj lub computer, thaum thov qee cov ntaub ntawv los ntawm lub vev xaib, tau txais cov lus teb tsis txaus ntseeg los ntawm lwm tus neeg rau zaub mov (DNS lossis npe neeg rau zaub mov). Qhov no tau tshaj tawm rau tus neeg siv thaum cov lus "502 yuam kev" tshwm rau ntawm qhov screen.
Feem ntau cov neeg siv Is Taws Nem tau ntsib qhov yuam kev no ntau zaus, tab sis rau qee qhov nws yuav yog thawj zaug. Yuav ua li cas thaum cov lus "yuam kev 502" tshwm nyob rau hauv koj lub computer screen? Ua ntej tshaj plaws, koj yuav tsum xyuas seb koj puas muaj kev nkag mus rau hauv Internet txhua. Ua li no, ntaus hauv qhov browser qhov chaw nyob ntawm lwm qhov chaw, uasyog guaranteed ua hauj lwm tam sim no, vim hais tias, piv txwv li, neeg nkag mus rau hauv Internet yog nqa tawm los ntawm ib tug neeg rau zaub mov, thiab tsis tam sim ntawd los ntawm ib tug modem txuas nrog los yog tsim rau hauv koj lub computer. Yog tias tom kawg qhov kev ua yuam kev tau lees paub ntau yam ntxiv, tom qab ntawd thaum nkag mus rau Is Taws Nem ntawm lub network hauv zos, lub kaw lus tsis muaj peev xwm txheeb xyuas qhov yuam kev. Hauv qhov no, tus neeg siv tsis muaj kev xaiv tab sis nrhiav seb yog vim li cas rau nws cov tsos los ntawm kev tsis ncaj ncees.
Yog tias koj nkag mus rau Is Taws Nem, tab sis thaum koj sim rov thov nplooj ntawv los ntawm qhov chaw xav tau, cov lus "yuam kev 502" tseem tshwm, ces qhov no koj yuav tsum sim tshem cov ncuav qab zib rau lub xaib no lossis tag nrho cov hauv koj tus browser.
Yuav ua li no, koj tuaj yeem ua cov hauv qab no:
- rau Internet Explorer versions 7+: hauv cov ntawv qhia zaub mov, mus rau "Tsev", tom qab ntawd xaiv "Internet Options", nyem rau ntawm "Delete" khawm, thiab tom qab ntawd ntawm "Delete ncuav qab zib" khawm;
- rau cov ntawv dhau los ntawm Internet Explorer: mus rau "Tsev ntawv qhia zaub mov", saib rau "Internet xaiv" thiab nyem "Delete ncuav qab zib";
- rau Firefox: mus rau "Tswb", nrhiav "Chaw", xaiv "Cookies" thiab nyem rau ntawm "Clear ncuav qab zib";
- rau Opera: mus rau "Cov cuab yeej", xaiv "Rho tawm cov ntaub ntawv tus kheej" thiab kos cov kev xaiv tsim nyog;
- rau Google Chrome: mus rau "Tswb", nyem rau ntawm "History", nyem rau ntawm "Clear History" thiab tom qab ntawd rau "Clear Cookies".
Thaum lub sijhawm ua haujlwm ib txwm muaj, qhov yuam kev zoo li no tshwm sim tsis tshua muaj, tsuas yog thaum rov pib lub vev xaib servers. Yog tias nws tau sau tseg rau ntau tshaj peb caug vib nas this, ces koj yuav tsum sim tshem qhov browser cache, ncuav qab zib, thiab rov pib lub browser nws tus kheej
Yog tias tom qab cov kauj ruam ua kom tshem cov ncuav qab zib, cov lus "yuam kev 502" tseem tshwm sim ntawm qhov screen, qhov no qhia tau tias txhua yam nyob rau hauv kev txiav txim nrog koj lub computer thiab network, thiab feem ntau yuav muaj teeb meem nrog lub server.. Hauv qhov no, koj yuav tsum tau tos me ntsis kom txog thaum cov thawj coj daws cov teeb meem no, thiab rov sim dua.
