Sonya Leoni
06491/2008
Lab 4.2.3 Tracing Internet Connectivity
Objectives
Objectives
- Use software that shows how data travels through the Internet
- Use the ping utility to test connectivity to a remote network.
- Construct a visual map of connectivity from your network to a remote network.
Background / Preparation
In order to perform this lab, Internet connectivity is required. On a PC, open a web
browser to ensure connectivity exists before beginning this lab.
This lab has an optional first step of downloading and installing a free program that can
be used to determine the path a packet takes through the Internet. This program may be
free, but it also may be copyrighted. Also, it may be that you are not permitted on a
campus computer to download and install software. Check with the instructor or student
assistant if you are unsure.
The following resources will be required :
- Windows-based computer with Internet connectivity
- Ability to download and install freeware software (optional)
- Access to the Run command
Step 1: (Optional) Download and install a free program
a. Open a search engine such as Google (www.google.com), Yahoo (www.yahoo.com), or Search (http://search.com ).
b. Which words do you think would give you the best result if you are searching for a visual program that allows you to trace how data (a packet) travels through the Internet? Write your search words.Visual Program for Trace Route Tool
c. Type the words you chose in the Search field. Locate and download the software and install it. Normally, the website has a link to the download site or you can click the words ³Download´ or ³Download Now´. When you download any freeware, remember the location on the hard drive, flash drive, or disk media where you saved the program. Write down where the download is saved.C:\Documents and Settings\Vania\My Documents\Downloads\Document
d. What is the name of the program you installed?Visual Trace Route Tool
Step 2: Locate web sites
a. Using the search engine again, locate five businesses with a web server, which are located in a country different from your own.
b. Write the names of the five business web sites.
Step 2: Locate web sites
a. Using the search engine again, locate five businesses with a web server, which are located in a country different from your own.
b. Write the names of the five business web sites.
Step 3: (Optional) Use downloaded visual trace route tool
a. Using the software you have downloaded and installed, use the tool to determine the
path which the packet takes to reach one of the remote country destinations. Each
tool normally allows you to type a URL. The program should either list or visually
display the path taken by the packet.
b. How many hops does the packet take to get from your computer to the destination
computer? 2.
c. Use the tool to determine the path to another foreign country site.
d. How many hops does the packet take to get from your computer to the destination
computer? 5.
e. Use the tool to determine the path to a web site in your own country.
f. Was the time it took to reach a web site in your own country shorter or longer? shoter
Step 4: Use the tracert command
a. Click the Start button, click the Run option, type cmd, and press Enter. An alternate way to get to the command prompt is to click Start > All Programs > Accessories > Command Prompt.
b. From the command prompt, type tracert and press Enter. Options that can be used with the tracert command are shown. Items shown in square brackets [ ] are optional. For example, the first option that can be used with the tracert command is ± d. If someone was to type tracert ±dwww.cisco.com , then the command issued to the computer is to trace the route to www.cisco.com , but do not try to resolve IP
addresses to names. The target_name parameter is mandatory (it does not have brackets around it) and it is replaced with the destination network. In the previous example of tracert ±dwww.cisco.com , ww.cisco.com is the target_name
a. Using the software you have downloaded and installed, use the tool to determine the
path which the packet takes to reach one of the remote country destinations. Each
tool normally allows you to type a URL. The program should either list or visually
display the path taken by the packet.
b. How many hops does the packet take to get from your computer to the destination
computer? 2.
c. Use the tool to determine the path to another foreign country site.
d. How many hops does the packet take to get from your computer to the destination
computer? 5.
e. Use the tool to determine the path to a web site in your own country.
f. Was the time it took to reach a web site in your own country shorter or longer? shoter
Step 4: Use the tracert command
a. Click the Start button, click the Run option, type cmd, and press Enter. An alternate way to get to the command prompt is to click Start > All Programs > Accessories > Command Prompt.
b. From the command prompt, type tracert and press Enter. Options that can be used with the tracert command are shown. Items shown in square brackets [ ] are optional. For example, the first option that can be used with the tracert command is ± d. If someone was to type tracert ±dwww.cisco.com , then the command issued to the computer is to trace the route to www.cisco.com , but do not try to resolve IP
addresses to names. The target_name parameter is mandatory (it does not have brackets around it) and it is replaced with the destination network. In the previous example of tracert ±dwww.cisco.com , ww.cisco.com is the target_name
Step 5: Use the pathping command
a. A similar command that can be used on a Windows XP computer is pathping. This command combines the abilities of the tracert command with the ping command. From the command prompt, use the pathping command to determine the IP addresses of the routers used to create the packet path to another foreign country address. An example of the pathping command used to trace the path to Cisco is pathping www.cisco.com.
b. How many hops did the pathping command display to your remote destination?6.
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