Scribd
Upload
19 views7 pages

Lab 4 Icmp-2

This document discusses a lab on analyzing ICMP packets using Wireshark. It contains questions and answers about identifying information within ICMP packets like source/destination IP addresses, protocol numbers, fields within different ICMP packet types and noticing delays between packet transmissions over long distance links.

Uploaded by

gayatri16302
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
19 views7 pages

Lab 4 Icmp-2

This document discusses a lab on analyzing ICMP packets using Wireshark. It contains questions and answers about identifying information within ICMP packets like source/destination IP addresses, protocol numbers, fields within different ICMP packet types and noticing delays between packet transmissions over long distance links.

Uploaded by

gayatri16302
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 7

Lab4: Wireshark: ICMP 1

Lab4:
Wireshark: ICMP v8.0
Gayatri
0878834
Computer network and security
IT-6003-7B3-24/SP
Prof. Hoell
04/14/2024
Lab4: Wireshark: ICMP 2

1 Answer: The IP address of my host: 192.168.1.101.

The IP address of destination host: 143.89.14.34.

2 Answer: Since the purpose of the ICMP packet is to transfer network-layer data between hosts
and routers rather than between application-layer processes, it does not contain source or
destination port numbers. An ICMP packet's "Type" and "Code" are unique to it. The message
being received is identified by the Type/Code combination. No port numbers are required to
route an ICMP message to an application layer process because all ICMP signals are interpreted
by the network software itself.

3 Answer: The code number is 0 and the ICMP type is 8. Checksum, identification, sequence
number, and data fields are also present in the ICMP packet. There are two bytes in each of the
checksum, sequence number, and identifier fields.
Lab4: Wireshark: ICMP 3

4 Answer: Both the code number and the ICMP type are 0. Checksum, identification, sequence
number, and data fields are also present in the ICMP packet. There are two bytes in each of the
checksum, sequence number, and identifier fields.
Lab4: Wireshark: ICMP 4

5 Answer: The IP address of my host is 10.216.228.1. The IP address of destination host is


192.168.1.101.

6 Answer: No, the IP protocol number should be 0x11 if ICMP had transmitted UDP packets
instead.

7 Answer: The fields of an ICMP echo packet are identical to those in a ping query packet.
Lab4: Wireshark: ICMP 5
Lab4: Wireshark: ICMP 6

8 Answer: Ping query packets and ICMP error packets are not the same. It includes the first eight
bytes of the original ICMP packet for which the error is related, as well as the IP header.

9 Answer: Instead of message type 11 (TTL expired), the last three ICMP packets are message
type 0 (echo reply). The reason they differ is that the datagrams reached the destination host
before the TTL ran out.

10 Answer: There is a link with a noticeably greater wait between steps 11 and 12. This connects
Aubervilliers, France to New York via the transatlantic route. The link in Lab Figure 4 is
between Pastourelle, France and New York.
Lab4: Wireshark: ICMP 7

You might also like