Name
Source Protocol (IP) Address
Synopsis
Identifies the higher-level address of the system issuing the ARP packet. The packet may be either a request or a response.
- Size
Varies according to higher-level protocol in use. With IP, this field is four bytes (32 bits) long.
- Notes
Every ARP exchange consists of two distinct packets: the original request and a response to the request. The Source Protocol Address field indicates the sender of this specific ARP packet. If the ARP packet is a request, then this field contains the IP address of the device that is sending the request. If the ARP packet is a response, then this field contains the IP address of the device that is sending the response.
- Capture Sample
In the capture shown in Figure 3.15, the Source Protocol Address shows the 32-bit IP address of 192.168.10.10.
Figure 3.15. The Source Protocol Address field- See Also
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