Question

Using a packet sniffer, for one of the packets you captured, you see in your packet analyzer that the IP header (in hexadecimal) is:

45 00 00 34 fb 24 40 00 40 06 0a 65 c0 a8 04 06 17 db 58 b1

What is the destination IP address (in decimal dot notation) of that packet?

Answer 1

Answer :- The IP header has destination IP address from 17th to 20th byte. Here we have those bytes as 17 db 58 b1 in hexadecimal. Hence the destination IP address in decimal is-

Destination IP address 23.219.88.177

The source IP address is from 13th byte to 16th byte. Here these bytes are C0 A8 04 06 (in hexadecimal). In decimal 192.168.4.6

The IP header format has been shown below.

15 16 31 IHL Type of Service VersionI Total Length Flags Fragment Offset Identification Protocol Time to Live Header Checksu Source IP Address Destination IP Address Padding Options