Txhua qhov chaw nyob hauv Internet tau txiav txim los ntawm lub koom haum tshwj xeeb hu ua InterNIC, uas tswj hwm thoob ntiaj teb cov network. Qhov chaw nyob IP uas twb muaj lawm tau muab faib ua cov chav kawm. Feem ntau yog cov chav kawm A, B thiab C. Chav kawm D thiab E tsis yog tsim rau cov neeg siv kawg.
Cov Lus Qhia
Kauj ruam 1
Cov chav kawm ntawm tus IP chaw nyob yog txiav txim siab los ntawm nws thawj lub kaum hli ntuj, i.e. thawj tus naj npawb sawv cev rau qhov muaj nqis ntawm txhua plaub ntawm bytes hauv daim foos. Feem ntau, txhua tus IP address yog kev sib txuas ntawm ob qhov muaj kuab:
- tus naj npawb network;
- node tus naj npawb hauv lub network.
Nws yog thawj cov lej ntawm IP chaw nyob uas txiav txim xyuas qhov twg ntawm qhov chaw nyob ntawd qhia tus naj npawb ntawm lub network, thiab ntu twg yog qhia ntawm cov lej ntawm lub network. Tsis tas li, los ntawm lub neej ntawd, txhua chav kawm chaw nyob siv nws tus kheej subnet daim npog qhov ncauj.
Kauj ruam 2
Cov chav kawm A A muaj chaw nyob pib txij 0 txog 126 thiab lub ntsej muag subnet ntawm 255.0.0.0. Tib lub sijhawm, tus lej 127 tau npaj rau tshwj xeeb, thiab tus lej 0 tsis raug siv. Ib qho piv txwv ntawm cov chaw nyob yog 10.52.36.11, qhov twg lub octet yog tus lej 10.
Kauj ruam 3
Tus nqi ntawm thawj lub kaum hli ntuj nyob rau hauv thaj tsam ntawm 128 txog 191 qhia tau hais tias lub network belongs rau chav kawm B. Lub subnet daim npog qhov ncauj ntawm cov tes hauj lwm yog 255.255.0.0. Ib qho piv txwv ntawm qhov chaw nyob yog 172.16.52.63, nyob rau hauv uas tus lej 172 yog thawj lub octet.
Kauj ruam 4
Yog tias IP chaw nyob pib nrog tus lej hauv thaj tsam 192 txog 223, tom qab ntawd nws yog rau chav kawm C. Cov chaw nyob no siv lub ntsej muag subnet ntawm 255.255.255.0. Ib qho piv txwv ntawm chav kawm C chaw nyob yog 192.168.123.132, thawj octet ntawm uas yog 192.
Kauj ruam 5
Ib qho chaw nyob ntau qhov, lossis multicast, pib nrog 1110 yog chav kawm D. Muab chav kawm D chaw nyob rau pob ntawv chaw nyob txhais tau tias pob ntawv tau txais los ntawm txhua tus tswv nrog tus IP chaw nyob. Lub ntsej muag subnet ntawm chav kawm D chaw nyob yog 239.255.255.255.
Kauj Ruam 6
Lwm chav kawm ntawm IP chaw nyob raug siv rau yav tom ntej yog chav kawm ntawv E. Thawj tus lej ntawm cov chaw nyob yog kab ntawv 11110, thiab subnet daim npog siv los ntawm chav kawm E chaw nyob yog 247.255.255.255.
Kauj Ruam 7
Thov nco ntsoov tias qee kis muaj nuj nqi subnet daim npog qhov ncauj yuav tsis tau raws li qhov xav tau ntawm qee lub koomhaum thiab tuaj yeem hloov chaw tau.
