Yuav Lej Li Cas Qhov Chaw Nyob Network thiab Chaw Nyob Tshaj Tawm (nrog Duab)

• Tus naj npawb ntawm bytes sab laug rau tus tswv = m = T_b - n = 8 - 3 = 5

  

Kauj Ruam 3. Tam sim no xam "Tus naj npawb ntawm subnets" = 2 thiab "Tus lej kawg byte siv rau subnet daim npog" (Δ) = 2^m.

Tus naj npawb ntawm tus tswv ib subnet = 2^m - 2.

• Tus naj npawb ntawm subnets = 2 = 2³ = 8

  Tus nqi ntawm qhov kawg siv rau subnet daim npog = = 2^m = 2⁵ = 32

  

Kauj Ruam 4. Tam sim no koj tuaj yeem pom tus lej suav yav dhau los ntawm subnets los ntawm kev faib cov subnets txhua qhov muaj "Tus lej kawg byte siv rau subnet daim npog" lossis chaw nyob

• 8 subnets (raws li xam hauv cov kauj ruam dhau los) tau qhia saum toj no.
• Txhua tus muaj 32 qhov chaw nyob.

Kauj Ruam 5. Tam sim no pom koj tus IP chaw nyob uas subnet, thawj qhov chaw nyob ntawm subnet yog lub network chaw nyob thiab chaw nyob kawg yog qhov chaw tshaj tawm

• Hauv qhov no, tus IP chaw nyob yog 210.1.1.100. 210.1.1.100 muaj 210.1.1.96 - subnet 210.1.1.127 (saib cov lus hauv cov kauj ruam dhau los). Yog li, 210.1.1.96 yog qhov chaw nyob network thiab 210.1.1.127 yog qhov chaw tshaj tawm rau tus IP chaw nyob, uas yog 210.1.1.100.

  

Txoj Kev 2 ntawm 2: Rau CIDR

Kauj Ruam 1. Hauv CIDR, koj muaj tus IP chaw nyob tom qab byte-ntev ua ntej ua ntej sib cais los ntawm tus slash (/)

Tam sim no hloov pauv byte-ntev ua ntej mus rau plaub-dotted zauv sawv cev. Txhawm rau ua qhov no, ua raws cov theem no.

1. Sau cov ntawv ua ntej byte hauv hom ntawv hauv qab no.

   

   • Yog tias tus nqi yog 27, tom qab ntawv sau nws li 8 + 8 + 8 + 3.
   • Yog tias tus nqi yog 12, tom qab ntawv sau nws li 8 + 4 + 0 + 0.
   • Tus nqi pib yog 32, uas tau sau ua 8 + 8 + 8 + 8.

2. Hloov cov lej sib thooj raws li cov lus hauv qab no thiab nthuav tawm lawv hauv plaub-point decimal format.

   

3. Xav tias tus IP chaw nyob yog 170.1.0.0/26. Siv cov lus saum toj no, koj tuaj yeem sau:

										26	=	8	+	8	+	8	+	2
												255	.	255	.	255	.	192

Tam sim no tus IP chaw nyob yog 170.1.0.0 thiab subnet daim npog hauv plaub-dot decimal format yog 255.255.255.192.



Kauj ruam 2. Tag nrho bytes = T_b = 8.

• Subnet qhov ncauj qhov ntswg yog 0, 128, 192, 224, 240, 248, 252, 254, thiab 255.

• Cov lus hauv qab no hais txog "Tus lej bytes siv rau subnetting" (n) ntawm qhov sib thooj subnet npog.

  

• Rau subnet daim npog 255 yog tus nqi qub. Yog li, nws tsis tas yuav tsum tau coj mus rau hauv tus account subnet qhov ncauj qhov ntswg.

• Los ntawm cov kauj ruam dhau los, tau txais IP chaw nyob = 170.1.0.0 thiab subnet mask = 255.255.255.192

  Tag nrho bytes = T_b = 8 Tus lej bytes siv rau subnetting = n = 2 (txij li subnet daim npog = 192 thiab qhov sib thooj "Tus naj npawb ntawm cov khoom siv rau subnetting" yog 2 los ntawm cov lus saum toj no)

  



Kauj Ruam 3. Los ntawm cov kauj ruam dhau los, peb tau txais "Tus lej ntawm cov khoom siv rau subnetting" (n) thiab paub "T_b", tom qab ntawd koj tuaj yeem tau txais" Tus naj npawb ntawm bytes sab laug rau tus tswv "(m) = T_b - n raws li tag nrho bytes yog qhov sib npaug ntawm cov lej siv rau subnetting thiab tus lej bytes tshuav rau tus tswv tsev, piv txwv li T_b = m+n os.

Tus naj npawb ntawm bytes sab laug rau tus tswv = m = T_b n = 8 - 2 = 6



Kauj Ruam 4. Tam sim no xam "Tus naj npawb ntawm subnets" = 2 thiab "Tus lej kawg byte siv rau subnet daim npog" (Δ) = 2^m.

Tus naj npawb ntawm tus tswv ib subnet = 2^m - 2.

• Tus naj npawb ntawm subnets = 2 = 2² = 4

  Tus nqi ntawm qhov kawg siv rau subnet mask = = 2^m = 2⁶ = 64

  

Kauj Ruam 5. Tam sim no koj tuaj yeem pom tus lej suav yav dhau los ntawm subnets los ntawm kev faib cov subnets txhua qhov muaj "Tus lej kawg byte siv rau subnet daim npog" lossis chaw nyob

• 4 subnets (raws li xam hauv cov kauj ruam dhau los) yog

  

• Txhua tus muaj 64 qhov chaw nyob.

  



Kauj Ruam 6. Tam sim no nrhiav seb subnet twg koj tus IP chaw nyob yog, thawj qhov chaw nyob ntawm subnet yog lub network chaw nyob thiab chaw nyob kawg yog qhov chaw tshaj tawm

• Hauv qhov no, tus IP chaw nyob yog 170.1.0.0; 170.1.0.0 muaj 170.1.0.0 - subnet ntawm 170.1.0.63 (saib cov lus hauv cov kauj ruam dhau los). Yog li 170.1.0.0 yog qhov chaw nyob network thiab 170.1.0.63 yog qhov chaw tshaj tawm rau tus IP chaw nyob, uas yog 170.1.0.0.

  

Piv txwv

Rau Classy Network

• IP chaw nyob = 100.5.150.34 thiab subnet mask = 255.255.240.0

  Tag nrho bytes = T_b = 8

  Subnet daim npog qhov ncauj	0	128	192	224	240	248	252	254	255
  Tus naj npawb ntawm cov khoom siv rau subnetting (n)	0	1	2	3	4	5	6	7	8

  Tus naj npawb ntawm bytes siv rau subnetting rau subnet daim npog 240 = n₁ = 4

  (txij li subnet daim npog ntsej muag = 240 thiab sib xws "Tus naj npawb ntawm cov khoom siv rau subnetting" yog 4 los ntawm cov lus saum toj no)

  Tus naj npawb ntawm bytes siv rau subnetting rau subnet daim npog qhov ncauj 0 = n₂ = 0

  (txij li subnet daim npog = 0 thiab sib xws "Tus naj npawb ntawm cov khoom siv rau subnetting" yog 0 los ntawm cov lus saum toj no)

  Tus naj npawb ntawm bytes tseem tshuav rau cov tswv rau subnet daim npog 240 = m₁ = T ua_b -n₁ = 8 - 4 = 4

  Tus naj npawb ntawm bytes tseem tshuav rau cov tswv rau subnet daim npog 0 = m₂ = T ua_b -n₂ = 8 - 0 = 8

  Tus naj npawb ntawm subnets rau subnet daim npog 240 = 2 ^₁ = 2⁴ = 16

  Tus naj npawb ntawm subnets rau subnet daim npog qhov ncauj 0 = 2 ^₂ = 2⁰ = 1

  Tus nqi ntawm qhov kawg tau siv hauv kev tsim cov subnet daim npog rau lub ntsej muag subnet ntawm 240 =₁ = 2^m₁ = 2⁴ = 16

  Tus nqi ntawm qhov kawg tau siv hauv kev tsim cov subnet daim npog rau subnet daim npog qhov ncauj 0 =₂ = 2^m₂ = 2⁸ = 256

  Rau subnet daim npog qhov ncauj ntawm 240, qhov chaw nyob yuav muab faib ua 16 thiab rau subnet daim npog qhov ncauj ntawm 0, nws yuav muab faib los ntawm 256. Siv tus nqi ntawm₁ thiab₂, 16 subnets tau teev tseg hauv qab no

  100.5.0.0 - 100.5.15.255	100.5.16.0 - 100.5.31.255	100.5.32.0 - 100.5.47.255	100.5.48.0 - 100.5.63.255
  100.5.64.0 - 100.5.79.255	100.5.80.0 - 100.5.95.255	100.5.96.0 - 100.5.111.255	100.5.112.0 - 100.5.127.255
  100.5.128.0 - 100.5.143.255	100.5.144.0 - 100.5.159.255	100.5.160.0 - 100.5.175.255	100.5.176.0 - 100.5.191.255
  100.5.192.0 - 100.5.207.255	100.5.208.0 - 100.5.223.255	100.5.224.0 - 100.5.239.255	100.5.240.0 - 100.5.255.255

  IP chaw nyob 100.5.150.34 suav nrog 100.5.144.0 - 100.5.159.255 thiab yog li 100.5.144.0 yog qhov chaw nyob network thiab 100.5.159.255 yog qhov chaw tshaj tawm

Rau CIDR

• Tus IP chaw nyob hauv CIDR = 200.222.5.100/9

										9	=	8	+	1	+	0	+	0
												255	.	128	.	0	.	0

IP chaw nyob = 200.222.5.100 thiab subnet mask = 255.128.0.0

Tag nrho bytes = T_b = 8

Subnet daim npog qhov ncauj	0	128	192	224	240	248	252	254	255
Tus naj npawb ntawm cov khoom siv rau subnetting (n)	0	1	2	3	4	5	6	7	8

Tus naj npawb ntawm bytes siv rau subnetting rau subnet daim npog 128 = n₁ = 1

(txij li daim npog subnet = 128 thiab qhov sib thooj "Tus naj npawb ntawm cov khoom siv rau subnetting" yog 1 los ntawm cov lus saum toj no)

Tus naj npawb ntawm bytes siv rau subnetting rau subnet daim npog qhov ncauj 0 = n₂ = n₃ = 0

(txij li subnet daim npog = 0 thiab sib xws "Tus naj npawb ntawm cov khoom siv rau subnetting" yog 0 los ntawm cov lus saum toj no)

Tus naj npawb ntawm bytes tseem tshuav rau cov tswv rau subnet daim npog 128 = m₁ = T ua_b -n₁ = 8 - 1 = 7

Tus naj npawb ntawm bytes tseem tshuav rau cov tswv rau subnet daim npog 0 = m₂ = kuv₃ = T ua_b -n₂ = T ua_b -n₃ = 8 - 0 = 8

Tus naj npawb ntawm subnets rau subnet daim npog 128 = 2 ^₁ = 2¹ = 2

Tus naj npawb ntawm subnets rau subnet daim npog qhov ncauj 0 = 2 ^₂ = 2 ^₃ = 2⁰ = 1

Tus nqi ntawm qhov kawg tau siv hauv kev tsim cov subnet daim npog rau subnet daim npog ntawm 128 =₁ = 2^m₁ = 2⁷ = 128

Tus naj npawb ntawm tus tswv ib subnet = 2^m₁ - 2 = 2⁷ - 2 = 126

Tus nqi ntawm qhov kawg tau siv hauv kev tsim cov subnet daim npog rau subnet daim npog qhov ncauj 0 =₂ =₃ = 2^m₂ = 2^m₃ = 2⁸ = 256

Tus naj npawb ntawm tus tswv ib subnet rau subnet daim npog 0 = 2^m₂ - 2 = 2^m₃ - 2 = 2⁸ - 2 = 254

Rau subnet daim npog qhov ncauj ntawm 128, qhov chaw nyob yuav muab faib los ntawm 128 thiab rau subnet daim npog qhov ncauj ntawm 0, nws yuav muab faib los ntawm 256. Siv tus nqi ntawm₁,₂ thiab₃, 2 subnets tau teev tseg hauv qab no

200.0.0.0 - 200.127.255.255

200.128.0.0 - 200.255.255.255

IP chaw nyob 200.222.5.100 muaj 200.128.0.0 - 200.255.255.255 thiab yog li ntawd 200.128.0.0 yog qhov chaw nyob network thiab 200.255.255.255 yog qhov chaw tshaj tawm

Lub tswv yim

• Hauv CIDR, koj tuaj yeem ua raws cov txheej txheem txheej txheem txheej txheem tom qab koj hloov pauv byte-ntev ua ntej mus rau plaub-point decimal format.
• Txoj kev no tsuas yog siv rau IPv4, tsis siv rau IPv6.