Use the following network analyzer display of an ICMP packet to answer the follo
ID: 641194 • Letter: U
Question
Use the following network analyzer display of an ICMP packet to answer the following questions: 0000 12 00 B3 4A A2 4B 03 B2 FF FF C0 00
What kind of ICMP message is this (request or reply)?
What is the type number for this ICMP message (decimal)?
What information is contained in bytes 9 and 12?
If the information in bytes 9 to 12 is an IP address, what is its value (dotted decimal)?
8. Use the following network analyzer display of an ICMP destination-unreachable packet to answer the following questions:
0000 03 03 40 12 00 00 00 00 45 62 00 C8 DC 08 00 00
0010 F3 11 02 DC 32 14 10 01 C0 99 40 12 00 11 22 33
Why was the destination unreachable?
Was this message sent from a router or a host?
What type of protocol was in the failed datagram?
What was the time to live of the failed packet (decimal)?
What is the address of the destination of the failed datagram (dotted decimal)?
What is the address of the source of the failed datagram (dotted decimal)?
Explanation / Answer
1) reply
2)202.199.254.2
3) 9-Query
12-Destination unrecahable
4)unreachable because the enteries appeared in Free BSD firewall logs co incidently with tcpdump collecteion
5)192.168.99.254
6)192.168.99.254:524