What does this mean?
arp 42 who has 192.168.1.1? tell 192.168.1.33"
asked 02 Aug '11, 17:18
edited 02 Aug '11, 17:19
The host with IP address 192.168.1.33 wants to send some data. It knows it must send this data to 192.168.1.1, but it doesn't know the MAC address to send it to, so it has sent an Address Resolution Protocol (ARP) request to find out that information.
So, arp stands for "Address Resolution Protocol", and 42 is the number of bytes comprising this ARP packet. And since 42 is less than the minimum number of bytes for an Ethernet frame, it also means that you were capturing on the same machine that sent the ARP request, in this case, 192.168.1.33.
For more information about ARP, refer to sites such as:
answered 02 Aug '11, 19:47