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Objectives
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The purpose of these lab procedures is to visually see how the Ping and Traceroute Applications work. This will be done using WireShark and a precaptured file “ecet-375RemotePingTracert.pcap”. The use of IP and ICMP protocols in diagnostic testing will be accomplished by writing the command in the DOS Prompt and captured in the WireShark program (already done for us). This file will be analyzed, depicting which packets do what and the time taken between specific packets.
Results
During the exploration of this lab, the WireShark program was used to analyze a pre-captured internet session. Examining the “Ping” ofwww.iana.org is the basis of the first procedure. Determining which packets are DNS query’s and which packets are DNS responses as well as the actual IP address for this link is accomplished in the first few steps. With the ICMP protocol, knowing that there are four requests and four echo responses, these packets are found and documented. Additionally, the times between request and reply are found and recorded with the help of the “Set Time Reference (Toggle)” within the WireShark program.
The next procedure, Traceroute, also deals with a Dos command of “tracert” and is done on the same address of www.iana.org . The packets that take care of the DNS query for an IP address for the site are discovered and documented, as well as the number of HOPs performed on the investigated trace. Similar to the “Ping” procedure, the time between the requests and the error responses are discovered using the “Set Time Reference (Toggle)” with 3 requests and responses per HOP.
Conclusions
After completing this lab and seeing how these investigative tools can help in the diagnostic of a communication network, it is realized the importance of applications like these. In my profession I have used the “PING” command to see if a specific computer in the domain is “alive” and communicating. The Traceroute command is new and can be just as useful. Using the Traceroute application to ensure communications through all routers and switches is occurring and in a timely fashion can prove to be very useful in discovering issues to come.
