Networking Lab 3

Lab Name: OSI Model
Date: 9-21-07
Name: Leo Burke

Objectives
In this lab we were to learn more about the OSI model by researching and work with each layer. We were also to describe the layers in a mnemonic device.

Equipment list
Computer
internet
Serial cable
Lab computers

Notes and observations
the lab was easy to complete at home, the only problems I had was the last question, which required the hook up of 2 computers using a serial cable. Since I didn't have easy access to these, I waited until the next lab and stayed a little later to complete the question using the lab computers.

Diagrams, flowcharts, and figures:











References
Lab 3 Handout

Wikipedia entry for OSI Model

Questions

1. If we already had the TCP/IP model, why was the more complicated OSI model created?

To allow for protocols

2.What does the abbreviation OSI stand for? Who originated it? When?

Open Systems Interconnection, originated at the International Organization for standardization in 1977

3. (See Diagram)

4.
Switch, 2
Hub, 1
NIC, 2
Router 2
Cable, 1
Wireless 3
Patch panel 2
Bridge, 1

5. What is another name for a physical address?

Mac address,

How many bits do they require?

12 bits

When two machines attempt to transmit simultaneously on the same media segment, both messages become garbled and unintelligible. What is this condition normally called?

it’ a data collision

6.
What method is used to translate a known layer 3 address into an unknown layer 2 address? VLAN configuration.

7. What is your neighbor’s physical address?
Neighbors’s address is 66.55.155.191

. What address is added to the arp table when you ping www.sal.ksu.edu?
None, the requests times out.

8.

What are layer 3 gateway devices called?

Firewalls

What is the de-facto standard for logical addresses used today?

IP Addresses,

How many bits do they require

12 Bits

9.

Information provides how many server hops a ping goes through to get to it’s destination. The packets seem to go from Salina Kansa to Atlanta Georgia and back. In the console, the number of hops is around 15, from 4 KSU servers to a few others before reaching KWU's servers.

10.

1. What information is provided in the switch MAC address table?

Information on what Vlan is used, what the MAC address is, The type of port (Dynamic or static) and what ports are used.

Conclusions
This lab was not as hands on as other labs, however, I gained a few extra skills. I know the OSI model more than I used to. I also learned to use the "Tracert" command to find where my packets go. Other than that, it was a very long lab which took me a long time to complete. My only problem was going into the lab and connecting 2 computers via serial cable, which was hard only because I had to find time to do it during the week.