CS610 VU Assignment No. 1 Spring 2012 Solution

Q.1. As you know that Tracer route is a network utility program to check the status of specific system on
network, you are required to find the route of www.yahoo.com by using tracer route command explain all output provided by trace route command.


C:Documents and SettingsPaktutorial>tracert www.yahoo.com

Tracing route to eu-fp3.wa1.b.yahoo.com []

over a maximum of 30 hops:


1     *        *        *     Request timed out.

2    52 ms    74 ms    64 ms

3    63 ms    74 ms    59 ms

4    59 ms    84 ms    54 ms  tw23-static125.tw1.com []

5    72 ms    85 ms    84 ms  tw255-static145.tw1.com []

6    88 ms   100 ms   129 ms  tw255-static193.tw1.com []

7   209 ms   219 ms   219 ms  atm9-0-0.1877.gw2.par4.alter.net []


8   198 ms   209 ms   209 ms  so-4-1-0.XT1.PAR2.ALTER.NET []

9   338 ms   249 ms   255 ms  POS2-0.BR1.PAR2.ALTER.NET []

10   224 ms   224 ms   199 ms  unknown.Level3.net []

11   271 ms   209 ms   254 ms  ae-52-52.csw2.Paris1.Level3.net []

12   229 ms   224 ms   199 ms  ae-59-224.ebr2.Paris1.Level3.net []

13   218 ms   229 ms   224 ms  ae-6-6.car1.Dublin3.Level3.net []

14   214 ms   264 ms   329 ms  ae-7-7.car2.Dublin1.Level3.net []

15   242 ms   274 ms   234 ms

16   223 ms   229 ms   249 ms  ae-2.msr1.ird.yahoo.com []

17   287 ms   299 ms   253 ms  te-7-4.bas-b1.ird.yahoo.com []

18   232 ms   219 ms   239 ms  ir1.fp.vip.ird.yahoo.com []


Trace complete.

Q.2. You have been asked to wire a conference room with seven computers for a demonstration after a day. It needs to be done quickly and with lowest possible expenses. What network topology is best suited to this situation and why? Justify your answer with solid reasons?


Star Topology is the most common type of network topology that is used in homes and offices. In the Star Topology there is a central connection point called the hub which is a computer hub or sometimes just a switch. In a Star Network the best advantage is when there is a failure in cable then only one computer might get affected and not the entire network.

The Star Network Topology typically needs more cable to be networked than the usual Bus topology. A common cable that is used in Star Network is the UTP or the unshielded twisted pair cable. Another common cable that is used in star networks is the RJ45 or the Ethernet cables.

In a Star Network the entire network is dependant on the hub so if the entire network is not working then there could be a problem with the hub. This feature makes it easy to troubleshoot by offering a single point for error connection ad at the same time the dependency is also very high on that single point.

Star Topology Advantages

• A Star Network Topology is very easy to manage because of its simplicity in functionality.
• The problems can be easily located logically in a Star Topology and therefore is easy to troubleshoot also.
• The Star Topology is very simple in format so it is very easy to expand on the Star Topology.