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In: Computer Science

What is the importance of the OSI Model's Physical Layer? What are MAC addresses? How can...

  • What is the importance of the OSI Model's Physical Layer?
  • What are MAC addresses?
  • How can you identify the IP class of a given IP address?
  • What is the number of network IDs in a Class C network?

Please do not copy from the internet and use your OWN words . More than 250 words total . Again not copied from internet  

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