Networking 1 Lab03

Paige Piper

March 3, 2013

Objective: To further understand the OSI Model and its use with networks

Equipment:

  • Class Notes
  • Internet
  • Computer
  • Command Prompt

Diagrams, flowcharts, and figures:

Layer #

Layer Name

Mnemonic

Keywords & Description of Function

7 Application Away Software – Organizes segments into datagrams
6 Presentation Pizza Software – Organizes segments into datagrams
5 Session Sausage Software – Organizes segments into datagrams
4 Transport Throw Organizes packets into segments
3 Network Not Routers/Gateways – Organizes frames into packets
2 Data Link Do Switches & Bridges – Organizes bits into frames
1 Physical Please Hubs & Repeaters – Sends Bits

 

References:

http://www.dummies.com/how-to/content/getting-to-know-the-osi-model-for-the-ccna-exam.html

http://osilayers.org/

http://www.tcpipguide.com/free/t_HistoryoftheOSIReferenceModel.htm

Questions:

  1. If we already had the TCP/IP model, why was the more complicated OSI model created?
  • It breaks it down from 4 sections to 7, which gives a better understanding of what each layer is responsible for
  1. What does the abbreviation OSI stand for? Who originated it? When?
  • Open Systems Interconnections
  • International Organization for Standardization(ISO) made and published OSI model 1984
  1. Determine the highest layer of operation for the following network devices:
  • Switch: Layer 2
  • Hub: Layer 1
  • NIC: Layer 3
  • Router: Network Layer
  • Repeater:  Layer 1
  • Bridge: Layer 2
  1. What is another name for physical address? How many bits do they require? What is the condition called when two machines attempt to transmit at the same time on the same segment?
  • Layer 1
  • 48 bits
  • Collision
  1. What is your IP address?
  • IP: 192.168.16.117
  1. What does ARP stand for & what does it do? Why is ping useful?
  • Address Resolution Protocol
  • It lets you know if a network is connected or if the internet is working
  1. What are layer 3 gateway devices called?  How many bits do they require?
  • Router
  • 8 bits
  1. What kind of information does tracert provide?
  • It lists where messages have been from source to destination

Conclusion:

This lab kind of enforced some of the material we learned in class.  If we hadn’t missed the actual lab period due to the snowstorms, then it probably would have been a lot easier to learn and understand the concepts above.  The one thing this lab did help me understand more is the OSI layers and some of the things that occur in that certain layer.

 

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