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Merge pull request gyoogle#108 from SimDaSong/patch-1
2021-03-26 [Network] 4 way handshake Update
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โ€ŽComputer Science/Network/TCP 3 way handshake & 4 way handshake.mdโ€Ž

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@@ -32,7 +32,7 @@ TCP๋Š” ์ •ํ™•ํ•œ ์ „์†ก์„ ๋ณด์žฅํ•ด์•ผ ํ•œ๋‹ค. ๋”ฐ๋ผ์„œ ํ†ต์‹ ํ•˜๊ธฐ์— ์•ž์„œ
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1) ํด๋ผ์ด์–ธํŠธ๋Š” ์„œ๋ฒ„์—๊ฒŒ ์—ฐ๊ฒฐ์„ ์ข…๋ฃŒํ•œ๋‹ค๋Š” FIN ํ”Œ๋ž˜๊ทธ๋ฅผ ๋ณด๋‚ธ๋‹ค.
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2) ์„œ๋ฒ„๋Š” FIN์„ ๋ฐ›๊ณ , ํ™•์ธํ–ˆ๋‹ค๋Š” ACK๋ฅผ ํด๋ผ์ด์–ธํŠธ์—๊ฒŒ ๋ณด๋‚ธ๋‹ค. (์ด๋•Œ ๋ชจ๋“  ๋ฐ์ดํ„ฐ๋ฅผ ๋ณด๋‚ด๊ธฐ ์œ„ํ•ด TIME OUT ์ƒํƒœ๊ฐ€ ๋œ๋‹ค)
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2) ์„œ๋ฒ„๋Š” FIN์„ ๋ฐ›๊ณ , ํ™•์ธํ–ˆ๋‹ค๋Š” ACK๋ฅผ ํด๋ผ์ด์–ธํŠธ์—๊ฒŒ ๋ณด๋‚ธ๋‹ค. (์ด๋•Œ ๋ชจ๋“  ๋ฐ์ดํ„ฐ๋ฅผ ๋ณด๋‚ด๊ธฐ ์œ„ํ•ด CLOSE_WAIT ์ƒํƒœ๊ฐ€ ๋œ๋‹ค)
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3) ๋ฐ์ดํ„ฐ๋ฅผ ๋ชจ๋‘ ๋ณด๋ƒˆ๋‹ค๋ฉด, ์—ฐ๊ฒฐ์ด ์ข…๋ฃŒ๋˜์—ˆ๋‹ค๋Š” FIN ํ”Œ๋ž˜๊ทธ๋ฅผ ํด๋ผ์ด์–ธํŠธ์—๊ฒŒ ๋ณด๋‚ธ๋‹ค.
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@@ -52,4 +52,4 @@ TCP๋Š” ์ •ํ™•ํ•œ ์ „์†ก์„ ๋ณด์žฅํ•ด์•ผ ํ•œ๋‹ค. ๋”ฐ๋ผ์„œ ํ†ต์‹ ํ•˜๊ธฐ์— ์•ž์„œ
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##### [์ฐธ๊ณ  ์ž๋ฃŒ]
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[๋งํฌ](<https://www.geeksforgeeks.org/tcp-connection-termination/>)
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[๋งํฌ](<https://www.geeksforgeeks.org/tcp-connection-termination/>)

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