net 1. lab 3.
OSI LAYERS
OBJECTIVES:
The main objection of this lab is to become more familiar with the OSI Model.
EQUIPMENT:
Internet, pencil, paper.
NOTES/OBSERVATIONS:
This lab mostly asked questions that required research via the Internet.
DIAGRAMS/FIGURES:
Chart from Lab, Question 3
REFERENCES:
tcpipguide.com, wikipedia.com, Mr. Bill Genereux
QUESTIONS:
1. If we already had the TCP/IP model, why was the more complicated OSI model created?
It was intended to serve as the foundation for the establishment of a widely adopted suite of protocols that would be used by international internetworks – basically the Internet.
2. What does the abbreviation OSI stand for? Who originated it? When?
Open Systems Interconnection: Charles Bachman, 1984
3. Determine the highest layer of operation for the following network devices:
switch (2), hub(1), NIC(2), router(3), cable media(1), wireless access point(1), patch panel(1), repeater(1), bridge(2)
4. What is another name for a physical address? How many bits do they require? What is the condition of two machines attempting to transmit simultaneously on the same media segment normally called?
MAC address, 48 bits, collision
5. What method is used to translate a known layer 3 address into an unknown layer 2 address?
ARP (address resolution protocol): coverts IP to MAC
6. What is your neighbor’s physical address? What address is added to the arp table when you ping www.sal.ksu.edu? Why?
00-0e-a6-7f-37-29, no address comes up with the website because it’s within the K-State network
7. What are layer 3 gateway devices called?What is the de-facto standard for logical addresses used today? How many bits do they require?
router, IP=32 bits
8. You can get more information about connectivity by running a trace route. What kind of information does this utility provide? Describe the path a ping packet must follow to get from K-State Salina to Kansas Wesleyan?
Trace routes provide IP address of different stops between the sender to the destination. The ping packet starts at KSUS, goes to Chicago, Texas, Dallas, and the KWU. Took around 40 milliseconds.
9. What information is provided in the switch MAC address table?
Vlan, MAC address, Type, and Port
CONCLUSIONS:
I found the research required to answer the questions in this lab helpful in better understanding the OSI model. The hands on approach is definitely a great way to learn, especially when we traced the ping packets.
