Dab tsi yog qhov ua haujlwm ntawm cov txheej txheem teb hauv IPv4 header?
Dab tsi yog qhov ua haujlwm ntawm cov txheej txheem teb hauv IPv4 header?

Video: Dab tsi yog qhov ua haujlwm ntawm cov txheej txheem teb hauv IPv4 header?

Video: Dab tsi yog qhov ua haujlwm ntawm cov txheej txheem teb hauv IPv4 header?
Video: Nkauj Ntseeg | “Peb Theem ntawm Tes Hauj Lwm Qhia Tag Nrho Txog Vajtswv Qhov Kev Npaj Cawm Tib Neeg” 2024, Kaum ib hlis
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Cov Raws tu qauv hauv IPv4 npe muaj ib tug xov tooj qhia txog hom ntaub ntawv pom nyob rau hauv lub payload feem ntawm lub datagram. Cov txiaj ntsig tshaj plaws yog 17 (rau UDP) thiab 6 (rau TCP). Qhov no teb muab ib tug demultiplexing feature kom tus IP raws tu qauv tuaj yeem siv los nqa payloads ntau tshaj ib raws tu qauv hom.

Kuj paub, lub hom phiaj ntawm kev txheeb xyuas qhov chaw hauv IPv4 yog dab tsi?

RFC 6864 qhia meej tias qhov tseem ceeb Lub hom phiaj ntawm ID Field yog nyob rau hauv kev txhawb nqa ntawm fragmentation thiab reassembly. Hauv IPv4 , datagram loj yog txwv los ntawm Total Length teb nrog 16 ntsis. Yog li 2^16 yog 65535 bytes. Cov lus teb yog thawj pob ntawv IP yuav tsum tau muab faib ua ob pob ntawv.

Kuj Paub, daim teb twg hauv IPv4 header yog siv los txiav txim qhov tseem ceeb ntawm pob ntawv? Differentiated Services (DS) - Yav tas los hu ua Hom Kev Pabcuam (ToS) teb , cov DS teb yog 8bt teb siv los txiav txim qhov tseem ceeb ntawm txhua tus pob ntawv.

Hais txog qhov no, kev siv TTL teb hauv IPv4 header yog dab tsi?

Sijhawm mus nyob ( TTL ) yog tus nqi hauv Internet raws tu qauv (IP) pob ntawv uas qhia rau lub network router seb puas yog pob ntawv tau nyob hauv lub network ntev dhau lawm thiab yuav tsum muab pov tseg. Hauv IPv6 lub TTL teb nyob rau hauv txhua pob ntawv tau renamed lub hop txwv.

Dab tsi yog thaj chaw ntawm IPv4 pob ntawv?

Tus IP Lub taub hau Checksum raug tshem tawm hauv IPv6. Qhov Chaw Nyob Qhov Chaw (32 khoom) muaj qhov chaw nyob IPv4 ntawm tus neeg xa khoom (tej zaum yuav raug hloov kho los ntawm NAT). Qhov Chaw Nyob Qhov Chaw Nyob (32 khoom) muaj qhov chaw nyob IPv4 ntawm tus neeg tau txais kev pab (tej zaum yuav raug hloov kho los ntawm NAT hauv ib pob ntawv teb). Kev xaiv (0 txog 40 bytes) Tsis siv ntau zaus.

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