Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
IPアドレス(IPv4)の仕組み/overview-of-ipaddress
Search
nishina
March 26, 2018
Programming
180
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
IPアドレス(IPv4)の仕組み/overview-of-ipaddress
nishina
March 26, 2018
More Decks by nishina
See All by nishina
1週間で終わらせるはじめてのGo言語学習/beginner-study-go
nishina555
1
190
Postmanを利用したAPI開発/postman-tutorial
nishina555
0
140
テキスト校正ツールtextlintの 紹介と導入方法/textlint-overview
nishina555
0
140
認証・認可の仕組みを理解する上で知っておきたい基礎知識/auth-overview
nishina555
1
300
REST APIとの比較でざっくり理解するGraphQL/graphql-introduction
nishina555
0
220
ウィンドウ操作に便利な ショートカットとアプリ紹介/mac-window-shortcut
nishina555
0
200
図で理解する自然言語処理/nlp_tutorial
nishina555
0
310
ToDoアプリで学ぶReact/Redux入門/vtecx2_lt2
nishina555
2
3k
DiveIntoOSSThroughHacktoberfest_SPMKT
nishina555
1
350
Other Decks in Programming
See All in Programming
[DroidKaigi 2026] Bring your own phones to Gradle Managed Devices
f2lk
0
110
Kiroで創り、AgentCoreで繋ぐ!AWSで実践する「AI-DLC」から「AIエージェント統合」までの最新地図
licux
2
340
Building an Out-of-Order CPU
latte72
0
690
{ Android | Kotlin } Gradle Plugin in 2026
ryunen344
1
290
初心者DevRelとして参加者だった私が、DevRel Talks!#2に登壇するまでにしてきたこと
sokohirai
0
340
AIと壁打ちしながら進めるコスト管理
fufuhu
2
1.9k
Hono + Inertia + React で LP を構築した話
oukayuka
2
210
バグを直したら useEffect が消えた
colorful12
3
840
Can LLMs Replicate 4 Years of Compose Migration? Exploring the boundaries of automation with 279 XML files from a real product
makun
0
130
kubernetes コンポーネント開発入門 / 新卒N年目の勉強会&交流会!〜〇〇への誘い〜 #n_study
mazrean
0
160
LLMは4年分のCompose移行を再現できるのか?実プロダクト279件のXMLで探る自動化の境界線
makun
0
420
型解析で実現する Go の言語内 DSL / Conference に Go! タイムテーブルの歩き方 for Gophers
mazrean
0
130
Featured
See All Featured
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
52
6.1k
Marketing Yourself as an Engineer | Alaka | Gurzu
gurzu
0
290
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
21
1.6k
From π to Pie charts
rasagy
0
350
The #1 spot is gone: here's how to win anyway
tamaranovitovic
3
1.2k
The innovator’s Mindset - Leading Through an Era of Exponential Change - McGill University 2025
jdejongh
PRO
1
320
Reality Check: Gamification 10 Years Later
codingconduct
0
2.3k
Groundhog Day: Seeking Process in Gaming for Health
codingconduct
0
330
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
35
3.8k
The Curious Case for Waylosing
cassininazir
1
500
Facilitating Awesome Meetings
lara
57
7.1k
Digital Projects Gone Horribly Wrong (And the UX Pros Who Still Save the Day) - Dean Schuster
uxyall
1
2.7k
Transcript
ਔՊढ़ 2018/03/26 ʙ Ϋϥεྨ͔ΒαϒωοτϚεΫ·Ͱ ʙ IPΞυϨε(IPv4)ͷΈ
αʔϏεΛӡӦ͢ΔաఔͰωοτϫʔΫΛ੍ݶ͢Δػձଟ͍ ։ൃڥΛ֎෦͔ΒΞΫηεͰ͖ͳ͍Α͏ʹ͢ΔͨΊ ֎෦͔Βͷ߈ܸΛ͙ͨΊ ͳͥࠓIPΞυϨεʁ IPΞυϨεΛֶͿ͜ͱͰωοτϫʔΫͷӨڹൣғͳͲΛਖ਼͘͠ ཧղ͢Δ͜ͱ͕Ͱ͖Δ
IPΞυϨεͷ֓ཁ Ϋϥεʹ͍ͭͯ αϒωοτʹ͍ͭͯ ·ͱΊ ࣍
IPΞυϨεͷ֓ཁ
32ܻͷ0ɾ1ͷΈ߹Θͤ(2ਐ)ͰΓཱ͍ͬͯΔ 8Ϗοτ1ͱ͠ɺ4Έʹ͚ͯ10ਐͰදࣔͯ͠ਓͰ Θ͔Γ͍͢ܗͰදݱ͞Ε͍ͯΔ IPΞυϨεʹ͍ͭͯ 10000110 11101010 00000000 00000001 134
.234 .0 .1 2ਐ 10ਐ
ੈքతʹIANA(ICANN)Ͱ Ұݩཧ ຊࠃJPNIC͕ IPΞυϨεΛৼΓ͚͍ͯΔ ࠃϓϩόΠμͰར༻Ͱ͖Δ IPΞυϨεͷൣғܾ·͍ͬͯΔ IPΞυϨεͷৼΓ͚ํ IUUQTXXXDNBOKQOFUXPSLTVQQPSU*1@MJTUIUNM
ωοτϫʔΫ෦ͱϗετ෦ʹ͔Ε͓ͯΓɺ ʮͲͷωοτϫʔΫͷͲͷίϯϐϡʔλ͔ʯΛࣝผ͍ͯ͠Δ IPΞυϨεͷઌ಄͔ΒωοτϫʔΫ෦ ɾϗετ෦ͷॱ൪Ͱܻ͕ ׂΓৼΒΕΔɻ ωοτϫʔΫ෦ͱϗετ෦ͷڥքIPΞυϨεͷޙΖͷ”/“Ͱදݱ IPΞυϨεͷߏ 10000110 11101010
00000000 00000001 ϗετ෦ ωοτϫʔΫ෦ 134.234.0.1/16ͷ߹ 16ܻ 134.234ͷωοτϫʔΫͷ0.1ͱ͍͏ϗετ
ωοτϫʔΫ෦ͱϗετ෦ͷϧʔϧ (1/2) 134.234.0.1/16 134.234.0.2/16 134.234.0.3/16 134.235.xxx.xxx 134.234.xxx.xxx Πϯλʔωοτ ωοτϫʔΫ
ωοτϫʔΫ෦ωοτϫʔΫ͕ҧ͏߹ҧ͏Ͱͳ͚Ε͍͚ͳ͍
ωοτϫʔΫ෦ͱϗετ෦ͷϧʔϧ (2/2) 134.234.0.1/16 134.234.0.2/16 134.234.0.3/16 134.235.xxx.xxx 134.234.xxx.xxx Πϯλʔωοτ ϗετ෦ಉ͡ωοτϫʔΫͰ͋Εҧ͏Ͱͳ͍ͱ͍͚ͳ͍
ϗετ
શͯ0Ͱදݱ ϗετ෦ͯ͢Λࣔ͢ΞυϨε(= ωοτϫʔΫࣗΛࣔ͢) ωοτϫʔΫΞυϨε ϗετ෦ͷಛผͳΞυϨε(1/2) ྫ. 134.234.0.0/16 134.234.0.1 -
134.234.255.254ͷϗετ͕ଘࡏ͢Δ ωοτϫʔΫͷ͜ͱ 134.234.xxx.xxxͷωοτϫʔΫͷ͜ͱ
શͯ1Ͱදݱ ϗετ෦ͯ͢Λࣔ͢ શϗετʹಉҰͷ༰Λૹ৴͢Δͱ͖ͳͲʹར༻ ϒϩʔυΩϟετΞυϨε ϗετ෦ͷಛผͳΞυϨε(2/2) ྫ. 134.234.255.255 134.234.0.1 -
134.234.255.254ͷϗετશͯΛࢦ͢
ϩʔΧϧωοτϫʔΫͰׂΓͯΔ͜ͱͷͰ͖ΔΞυϨεͷ͜ͱ ϓϥΠϕʔτΞυϨεͱͯ͑͠ΔIPΞυϨεܾ·͍ͬͯΔ 10.0.0.1 ʙ10.255.255.254 (10.0.0.0/8) 172.16.0.1 ʙ172.31.255.254 (172.16.0.0/16) 192.168.0.1 ʙ192.168.255.254
(192.168.0.0/24) ϓϥΠϕʔτΞυϨε IPΞυϨεΛϗετ͝ͱͰͳ͘ωοτϫʔΫʹׂΓͯΔ͜ͱͰ ωοτϫʔΫؒͷϗετͰIPΛڞ༗͠ɺ4294967296(2ͷ32)Ҏ্ ͷίϯϐϡʔλʔ͕ΠϯλʔωοτΛར༻͢Δ͜ͱ͕Ͱ͖Δ
άϩʔόϧΞυϨεͱϓϥΠϕʔτΞυϨε 134.234.0.1 134.234.0.2 134.234.0.3 134.234.xxx.xxx 172.16.0.1 172.16.0.2 172.16.0.2 172.16.0.0
172.16.0.4 172.16.0.5 172.16.0.6 άϩʔόϧΞυϨε ϓϥΠϕʔτΞυϨε ϓϥΠϕʔτΞυϨεʹΑΓωοτϫʔΫ୯ҐͰάϩʔόϧΞυϨεΛڞ༗
ϓϥΠϕʔτΞυϨεͷܾ·Γ 134.234.0.1 134.234.0.2 134.234.0.3 134.234.xxx.xxx 172.16.0.1 172.16.0.2 172.16.0.3 172.16.0.0
172.16.0.1 172.16.0.2 172.16.0.3 172.16.0.0 ωοτϫʔΫ͕ҟͳΕϓϥΠϕʔτΞυϨεಉ͡Ͱྑ͍
Ϋϥεʹ͍ͭͯ
IPΞυϨεͷΫϥε IPΞυϨεωοτϫʔΫ෦ͱϗετ෦ͷΓ͚ํʹΑͬͯ ωοτϫʔΫͷن͕ҟͳΔ ωοτϫʔΫͷنʹΑͬͯIPΞυϨεΫϥεʹྨ͞ΕΔ ΫϥεʹΑͬͯར༻Ͱ͖ΔIPΞυϨε͕ܾ·͍ͬͯΔ (ͨͩ͠ɺࠓαϒωοτϚεΫ͕ಋೖ͞ΕͯॊೈʹIPΞυϨεΛ ར༻Ͱ͖ΔΑ͏ʹͳ͍ͬͯΔ)
Ϋϥεͷৄࡉ ΫϥεA ΫϥεB ΫϥεC ωοτϫʔΫن େن͚ தن͚ খن͚ ωοτϫʔΫ෦
্ҐϏοτ ্ҐϏοτ ্ҐϏοτ ωοτϫʔΫ ͷ ͷ ͷ ϗετ෦ ԼҐϏοτ ԼҐϏοτ ԼҐϏοτ ϗετ ͷ ͷ ͷ άϩόʔϧΞυϨε ʙ ʙ ʙ ϓϥΠϕʔτΞυϨε ʙ ʙ ʙ
αϒωοτʹ͍ͭͯ
ن͕େ͖͗ͣ͢খ͗͢͞ͳ͍ΫϥεBʹूத Ϋϥε͝ͱʹར༻Ͱ͖ΔIPΞυϨε͕ܾ·͍ͬͯΔͨΊ IPΞυϨε͕ෆ͢Δ ར༻͢ΔΫϥε͕ूத͢Δ ΫϥεBϗετ͕65,534ઃఆͰ͖Δ͕ݱ࣮తͰͳ͍ ϗετ͕༨ͬͨ݁ՌωοτϫʔΫ্ͰIPΞυϨε͕༨ͬͯ͠·͏ ϗετ͕ແବʹ༨Δ Ϋϥεͷ
αϒωοτϚεΫ ΫϥεʹറΒΕΔ͜ͱͳ͘ωοτϫʔΫ෦ͱϗετ෦ʹ͚ΒΕΔ Α͏ʹ͢Δࣝผࢠͷ͜ͱ ωοτϫʔΫ෦Λ1, ϗετ෦Λ0ͱ͢Δ ϓϨϑΟοΫεه๏ɺCIDR(Classless Inter-Domain Routing) Λར༻͢ΔࣄͰԿϏοτ͕ωοτϫʔΫ෦ͳͷ͔͕Θ͔Δɻ
αϒωοτϚεΫʹΑͬͯྨ͞ΕͨΫϥεωοτϫʔΫΛ αϒωοτͱ͍͏
αϒωοτͷ۩ମྫ 10101100 00010100 00000000 00000000 ϗετ෦ ωοτϫʔΫ෦ 172.20.0.0/16 16ܻ
Ϋϥεͷ߹ 10101100 00010100 00000000 00000000 ϗετ෦ ωοτϫʔΫ෦ 172.20.0.0/24 24ܻ αϒωοτͷ߹ 10101100 00010100 111111111 00000000 ϗετ෦ ωοτϫʔΫ෦ 172.20.1.0/24 24ܻ
IPΞυϨεͱαϒωοτϚεΫͷରԠ 10101100 00010100 00000000 00000000 ϗετ෦ ωοτϫʔΫ෦ 172.20.0.0/24 24ܻ
IPΞυϨε 111111111 111111111 111111111 00000000 ϗετ෦ ωοτϫʔΫ෦ 255.255.255.0 24ܻ αϒωοτϚεΫ ɾωοτϫʔΫ෦Λ1, ϗετ෦Λ0Ͱදݱͨ͠2ਐΛ10ਐʹ͢Δ ͱαϒωοτϚεΫͷͱͳΔ ɾαϒωοτϚεΫΛݟΕωοτϫʔΫͷن͕Θ͔Δɻ
(࠶ܝ) ΫϥεʹΑΔωοτϫʔΫ 134.234.0.1 134.234.0.2 134.234.0.3 134.234.xxx.xxx 172.16.0.1 172.16.0.2 172.16.0.3
172.16.0.0/16 172.16.0.4 172.16.0.5 172.16.0.6
αϒωοτϚεΫʹΑΓαϒωοτԽ͞ΕͨωοτϫʔΫ 134.234.0.1 134.234.0.2 134.234.0.3 134.234.xxx.xxx 172.16.0.0/24 172.16.0.1/24 172.16.0.2/24 172.16.0.3/24
172.16.1.0/24 172.16.1.1/24 172.16.1.2/24 172.16.1.3/24
·ͱΊ
IPΞυϨεʹ άϩʔόϧΞυϨεͱϓϥΠϕʔτΞυϨε͕͋Δ ϗετ෦͕શͯ0ͷͷωοτϫʔΫΞυϨε ϗετ෦͕શͯ1ͷͷϒϩʔυΩϟετΞυϨε ݩʑIPΞυϨεA, B, CͷΫϥεΛ͓࣋ͬͯΓɺ ࠓαϒωοτʹΑͬͯαϒωοτԽ͞Ε͍ͯΔ CIDR(/xx)ΛΈΔ͜ͱͰωοτϫʔΫͷنɺ ϗετ͕Θ͔Δɻ͕গͳ͍΄Ͳϗετଟ͍
·ͱΊ