Do these values remain unchanged for all of the ICMP TTL-exceeded replies sent to your computer by the nearest (first hop) router? Why? What is the value in the Identification field and the TTL field?ĩ.

The pattern in the identification field is that the field increases by one in each strand of echo requests.

Describe the pattern you see in the values in the Identification field of the IP datagram

Upper layer protocol(always using ICMP)ħ.

Which fields stay constant? Which of the fields must stay constant? Which fields must change? Why?

The header checksum and the Identification changes from each datagram to the next.Ħ.

Which fields in the IP datagram always change from one datagram to the next within this series of ICMP messages sent by your computer?

The fragment offset is set to 0, therefore, the packet has not been fragmented.ĥ.

Has this IP datagram been fragmented? Explain how you determined whether or not the datagram has been fragmented.

There are 20 bytes in the IP header which leaves 36 bytes for the payload of the IP datagram because we were sending a packet of length 56 bytes.Ĥ.

How many bytes are in the IP header? How many bytes are in the payload of the IP datagram? Explain how you determined the number of payload bytes. The value of the upper layer protocol field is ICMP (0X01)ģ.Within the IP packet header, what is the value in the upper layer protocol field?

The IP address of my computer is 192.168.1.110Ģ.Then press the Resume button.Ĥ.Finally, send a set of datagrams with a longer length, by selecting Edit->Advanced Options->Packet Options and enter a value of 3500 in the Packet Size field and then press OK. Send a set of datagrams with a longer length, by selecting Edit->Advanced Options->Packet Options and enter a value of 2000 in the Packet Size field and then press OK.

Select the menu item Edit->Advanced Options->Packet Options and enter a value of 56 in the Packet Size field and then press OK. If you are using a Windows platform, start up pingplotter and enter the name of a target destination in the “Address to Trace Window.” Enter 3 in the “# of times to Trace” field, so you don’t gather too much data. 1.Start up Wireshark and begin packet capture (Capture->Start) and then press OK on the Wireshark Packet Capture Options screenĢ.

Wireshark ip lab solutions