Lab 4: Exploring TCP/IP Networks


My objective in completing this lab was to learn about TCP/IP networks by working in a group to create one.

Equipment List:

a computer for each group member, an Ethernet cable for each group member, two switches, and a router

Notes and Observations:

I worked in a group of three to create a C type network using three computers and a switch. We had to disconnect from the school network for this to work.  Here are our three cables connected to the switch.20160923_095201.jpg

We then had to manually set our IP addresses. The first three numbers: 192, 168, and 10 were the same for all three of us. We all had to use the same Subnet mask as well, otherwise the network wouldn’t have worked.


We then pinged each other from the command prompt to verify that the basic network was working properly. I typed “ping” and then the IP address of one of my group members.2cropped.png

We realized the group next to us was creating a C-type network, so we switched ours to a B-type at network the last minute. Notice that the Subnet mask is different now. Also, now only the first two numbers, 172 and 16, are the same for all three of us. btypenetworkcropped.png

The next step was to connect our switch to a router along with another group so we could communicate across networks. Here are both networks connected to the router by Ethernet cables.  We had to install special software to make the router work with our operating system because of how old it is. We then had to program the router. Ultimately, we couldn’t communicate across networks.20160923_103406.jpg

Diagrams, Flowcharts, and Figures:



The lab manual included numerous questions that will be answered in this section.

Compare and Contrast the IANA and ARIN, what is the difference in missions between these organizations?

IANA (Internet Assigned Numbers Authority) coordinates standards to keep the internet running smoothly around the globe. ARIN distributes numbers such as IP addresses.

What are some reasons behind updating the TCP/IP protocol with a new IPv6 standard?

IPv4 is out of addresses. IPv6 is 128 bit and has many many more available addresses.

What are some reasons to continue to use the IPv4 standard?

IPv4 is well established and many devices operate with it.

What protocol is used to automatically (dynamically) assign IP addresses to computers?

The dynamic host configuration protocol.


Our group managed to get the switch to work, but when we joined with the group next to us, for unknown reasons, we couldn’t get the router to work. It goes to show how finicky networking equipment is. Whatever detail was off was minute enough that a group of five students (a congregate of a two student group and a three student group) + the professor couldn’t figure out what was wrong.


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