Networking Lab3
The OSI Model
September 24, 2008
Natasha Busch

Objectives: My objective is to learn the OSI Model and understand it as a method of today’s computer networks

Equipment List: In this lab I watched Mr. Generux use a computer in the lab. This is because there wasn’t any internet connectivity for the student computers. He also used a Cisco Catalyst switch.

Notes and Observations: There are seven layers of the OSI model. U can use a mnemonic to learn them. The mnemonic i will always remember is PDNTSPA or PLEASE DO NOT THROW SAUSAGE PIZZA AWAY. These layers are the Physical, Data Link, Network, Transport, Session, Presentation, and Application layer. The abbreviation OSI stands for the Open System Interconnection Model. This model shows each level of system interconnection and the devices it uses. It also tells us what is done step by step to connect computers and systems together. Many devices appear in this model. A few of these devices are: Cables, connectors, switch, hub, NIC, Router and many more. We also learned how to use the arp command prompt command to list and clear the arp table. In addition we learned how to show the MAC address table. This lab was very interesting and will be very useful in learning how networks work.

Diagrams and Figures: We used the OSI diagram.

Reference and Questions: I frequently referenced the OSI Model diagrams. The ones we made and also the handout.

Questions:
1. it has a lot more detail and breaks it down into easier to understand sections. TCIP is only part f the OSI so it wasn’t a complete model.
2. OSI stands for Open Systems Interconnection Model.
3. See: attachment
4.
Switch: 2
Hub: 1
NIC: 2
Router: 3
Cable Media: 1
Wireless access point: 3
Patch Panel: 1
Repeater: 1
Bridge: 2
5. Another name for a physical address is the MAC address
It requires 6 bytes or 48 bits
Best effort delivery
6. Protocol is how level 2 and 3 communicate
7. Interface: 10.10.2.107—Oka
Internet Address Physical address Type
10.10.1.1 00-00-e2-3c-fd-03 dynamic
10.10.2.210 00-0e-a6-7f-42-27 dynamic
8. Routers are layer 3 gateway devices
The de-facto standard is IP
9. Over a maximum of 30 hops(number of hops) The path ping for K-State to Kansas Weslyan takes a very long path (however, it happens in less than a second) It was 13 hops through cox. Then goes to Oklahoma then back to Kansas. It goes through Kahren Ks.Regions network.
10. Mac Address 17 total (hardware addresses)
Type of connection, Ports, vlan-switch-virtual networks
It may separate into many switches (6 bytes, 48 bits)

Conclusions: The OSI model is a very useful model for networking. It is a step-by-step model and is very important for the understanding of how computers communicate. This lab is so important to networking and I will probably use it the rest of my career in the field of computers.