ARP(Address Resolution Protocol) Packet - Wireshark

ARP 란?

• Address Resolution Protocol
• MAC 주소를  검색하는데 사용되는 통신 프로토콜
• RFC 826 에 정의됨
• ARP 요청(Request) / ARP 응답(Reply)

 

패킷 구조

참고. https://en.wikipedia.org/wiki/Address_Resolution_Protocol

ARP 패킷 구조(byte)

 

ARP Request

Destination (목적지): Broadcast (ff:ff:ff:ff:ff:ff)

Source (출발지) : SamsungE_a4:34:14 (98:83:89:a4:34:14) - 현재 장비의 MAC Address

Opcode: request (1) : ARP Request

Sender MAC address: 송신자 MAC address

Sender IP address: 송신자 IP Address

Target MAC address: 00:00:00_00:00:00 (00:00:00:00:00:00)  : 목적지 MAC Address 를 알 수 없음

Target IP address: 목적지 IP Address

 

 

ARP Reply

Destination (목적지) : 요청 장비의 MAC Address

Source (출발지) : 응답 장비의 MAC Address

Opcode: reply (2) : ARP Reply

Sender MAC address: NexcomIn_7b:b8:92 (00:10:f3:7b:b8:92): - MAC address 응답

Sender IP address: Reply IP Address

Target MAC address: 목적지 MAC Address 

Target IP address: 목적지 IP Address