Network ARP

    ARP(Address Resolution Protocol)
    Network

    ARP(Address Resolution Protocol)

    1. ARP(Address Resolution Protocol) - ๊ฐ™์€ ๋„คํŠธ์›Œํฌ ์•ˆ์—์„œ ํŠน์ • IP ์ฃผ์†Œ๋ฅผ ๊ฐ€์ง„ MAC ์ฃผ์†Œ๋ฅผ ์•Œ์•„๋‚ด์–ด L2 ํ†ต์‹ ์„ ํ•˜๊ธฐ ์œ„ํ•จ - ๋„คํŠธ์›Œํฌ ํ†ต์‹ ์€ IP ์ฃผ์†Œ๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœ ํ•˜๋ฉฐ Destination IP ์ฃผ์†Œ๋ฅผ ๊ฐ€์ง€๊ณ  L3 ์˜์—ญ๊นŒ์ง€ ๋„์ฐฉํ•˜๊ณ  L2 ์Šค์œ„์น˜๋ฅผ ํ†ตํ•˜์—ฌ MAC ์ฃผ์†Œ๋ฅผ ์•Œ์•„๋‚ด์–ด L2 End to End ํ†ต์‹ ์„ ํ•จ - ๋ฌด์„  AP๊ฐ€ ํŠน์ • IP ์ฃผ์†Œ์˜ MAC ์ฃผ์†Œ๋ฅผ ์•Œ์•„๋‚ด๊ธฐ ์œ„ํ•˜์—ฌ Broadcast๋กœ ARP Reqeust(Who has ํŠน์ • IP?) - ํŠน์ • IP๋ฅผ ๊ฐ€์ง„ ์žฅ๋น„๊ฐ€ ๋ฌด์„  AP๋กœ MAC ์ฃผ์†Œ Unicast๋กœ ARP Reply(ํŠน์ • IP is at MAC ์ฃผ์†Œ) - ์‹ค์ œ 192.168.219.194 IP ์ฃผ์†Œ๊ฐ€ 90:9c:4a:c8:a4:44 MAC ์ฃผ์†Œ๋ฅผ ๊ฐ€์ง€๊ณ  ..

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