Video: Tus tswv tsev yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Lub octet nyob rau hauv lub subnet daim npog qhov ncauj uas muaj 224 muaj peb sib law liag binary 1s nyob rau hauv nws: 11100000. Yog li ntawd, "network feem "ntawm tag nrho tus IP chaw nyob yog: 192.168. 32.0. " host feem "ntawm qhov chaw nyob ip yog 0.0.
Ntxiv mus, dab tsi yog tus tswv tsev feem ntawm IP chaw nyob?
Kom tau txais lub network feem ntawm ib IP chaw nyob , koj yuav tsum ua binary THIAB ntawm cov ip chaw thiab nws netmask. Cov host feem yog binary THIAB ntawm inverted netmask (ntsis flipped ntawm 0 thiab 1).
Ib yam li ntawd, qhov chaw nyob host yog dab tsi? chaw nyob - Computer txhais Lub cev chaw nyob ntawm lub computer hauv network. Hauv Internet, a chaw nyob yog IP chaw nyob ntawm lub tshuab. Saib IP chaw nyob thiab hostname.
Ntawm no, dab tsi yog host ntsis?
Host bits yog ib feem ntawm qhov chaw nyob IP uas txheeb xyuas qhov tshwj xeeb tus tswv tsev hauv subnet. Lub ntsej muag subnet txiav txim siab npaum li cas ntawm qhov chaw nyob yog siv rau network me ntsis thiab host bits . Piv txwv li, tus IP (v4) chaw nyob ntawm 192.168. 0.64/26 muaj 6- bit host vim 26o32 me ntsis tau tshwj tseg rau qhov chaw network.
Yuav ua li cas koj xam tus naj npawb ntawm hosts?
Tag nrho tus lej ua IPv4 tus tswv tsev chaw nyob rau lub network yog 2 rau lub hwj chim ntawm lub tus tswv tsev bits, uas yog 32 minus tus lej ntawm network bits. Rau peb qhov piv txwv ntawm a /21 (network mask 255.255. 248.0) network, muaj 11 tus tswv tsev bits (32 chaw nyob me ntsis – 21 network khoom = 11 tus tswv tsev bits).
Pom zoo:
Tus tswv tsev hauv JavaScript yog dab tsi?
Lus Txhais thiab Kev Siv Tus tswv tsev cov cuab yeej teev lossis xa rov qab hostname thiab chaw nres nkoj ntawm URL. Nco tseg: Yog tias tus lej chaw nres nkoj tsis tau teev nyob rau hauv URL (los yog nws yog lub tswv yim qhov chaw nres nkoj - zoo li 80, lossis 443), qee qhov browsers yuav tsis tso saib tus lej chaw nres nkoj
Tus tswv tsev SMTP yog dab tsi?
SMTP yog tus txheej txheem (txoj kev) siv los xa email ntawm email servers, thiab los ntawm koj tus email software xa tawm email. Lub 'host' yog lub npe server. SMTP yog theemail xa server. Yog li, "SMTP Host" yog tus neeg rau zaub mov uas tuav lub SMTP neeg rau zaub mov
Tus tswv tsheb npav thiab tus tswv qhev yog dab tsi?
Thaum ib lub BCLK, ib qho thiab tsuas yog ib qho ntawm cov khoom txuas nrog lub tsheb npav yog tus tswv tsheb npav, txhua yam khoom siv yog ib tug qhev lossis tsis ua haujlwm. Tus tswv tsheb npav pib hloov tsheb npav, thaum tus qhev tsis muaj zog vim nws tsuas tuaj yeem tos qhov kev thov los ntawm tus tswv tsheb npav
Dab tsi yog tus tswv tsev ntau tshaj plaws hauv Class C network?
Class C Networks (/24 Prefixes) Nws yog 21-ntsis network tooj nrog 8-ntsis hostnumber. Chav kawm no txhais qhov siab tshaj plaws ntawm 2,097,152 (2 21) / 24 tes hauj lwm. Thiab txhua lub network txhawb nqa txog 254 (2 8 -2) tus tswv. Tag nrho cov chav kawm C network sawv cev rau 2 29 (536,870,912) chaw nyob; yog li nws tsuas yog 12.5% ntawm tag nrhoIPv4
Dab tsi yog qhov txawv ntawm tus tswv tsev raws li kev txheeb xyuas thiab kev nkag mus hauv network?
Qee qhov zoo ntawm hom IDS no yog: Lawv muaj peev xwm txheeb xyuas yog tias qhov kev tawm tsam tau ua tiav lossis tsis ua tiav, thaum lub network raws li IDS tsuas yog muab kev ceeb toom ntawm kev tawm tsam. Lub kaw lus raws li tus tswv tuaj yeem txheeb xyuas cov tsheb khiav tawm kom pom kev tawm tsam kos npe-yog li muab lawv lub peev xwm los saib xyuas cov tsheb khiav encrypted