Computer Communications Experiment 1 Report

Jos Mendes de Melo Junior

#104323597

1) The IP address of my host is 192.168.1.11

2) The routing table provides information of how my computer routes packets. For example, in the

first line it can be seen that when a packet is sent to a generic destination (0.0.0.0.), the packet

is first sent to the gateway. The field Metric in the routing table indicates the cost of using this

route to reach the destination.

3)

a) www.uwindsor.ca

Name: www.uwindsor.ca

IP Adress: (137.207.71.197)

b) www.sympatico.ca

Name: bsympatico.vo.llnwd.net

IP Adresses: 69.164.35.224

69.164.34.128

c) www.yahoo.com

Name: fd-fp3.wg1.b.yahoo.com

IP Adresses: 2001:4998:58:c02::a9

98.139.183.24

98.139.180.149

d) www.mit.edu

Name: e9566.b.akamaiedge.net

IP Adress: 184.86.32.128

e) 137.207.10.1

Name: gate.esx2f.uwindsor.ca

IP Adress: 137.207.10.1

4) The addresses www.uwindsor.ca and 137.207.10.1 did not respond to the ping command, even

when I tried to increase the maximum time. These two addresses are from the University of

Windsor. Using the command tracert with www.uwindsor.ca, I found that after the address

firewall.uwindsor.ca the trace of routers stopped to be shown. So, I think that is maybe some

mechanism of defense against cyber attacks.

The addresses www.sympatico.ca and www.mit.edu had the same minimum delay (15 ms), and the

address www.yahoo.com had the maximum delay (59 ms).

5) The addresses www.sympatico.ca and www.mit.edu have the same number of routers until they

are reached (6). The address www.yahoo.com has 20 routers until it is reached.

6)

- Yes, the IP addresses of the hosts can be read in the boxes Source or Destination.

- The command ping and the command tracert uses the protocol ICMP and the command

nslookup uses the protocol DNS.

- Yes, the IP address of my host can be viewed in the box Source or Destination.

- In the protocol headers it can be viewed information such as the IP version, the addresses of the

source and of the destination, how many bytes were captured.