* Protocol Analyzer 를 이용한 패킷 분석
[Explorer 이용한 http://www.naver.com 접속]
▶ Broadcast 을 통한 Naver.com 검색
(1) Ethernet v2.0 MAC Header
❶ Destination MAC Address : FF FF FF FF FF FF FF ➔ Broadcast ❷ Source MAC Address : 00 50 FC EC A7 39 ❸ Type : 08 00 ➔ IP
(2) IPv4 Header
➀ Version : 4 ➔ IPv4 ➁ Headerlength : 20 Byte ➂ Type : 00 ➔ Text Service ➃ Total length : 48 Byte ⑤ Identification : 25502 ⑥ Flags : 0 (분할가능, 마지막 패킷) ➔ 분할되지 않은 패킷
⑦ Fragment offset : 0 ⑧ TTL : 80 ➔ 128 seconds/hops ⑨ Protocol : 17 ➔ UDP ⑩ Header Checksum : 9424 ⑪ Source Address : 210.125.112.125 ➔ 인터넷 주소 ⑫ Destination Address : 255.255.255.255 ⑬ IP Option 은 없음
▶ Naver.com 에서 패킷 전송 받음
(1) Ethernet v2.0 MAC Header
❶ Destination MAC Address : 00 04 96 00 33 00 ❷ Source MAC Address : 00 50 FC EC A7 39 ❸ Type : 08 00 ➔ IP
2012.03.07
24페이지
