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I was reading the book, CCENT/CCNA ICND1 Official Exam Certification Guide  by Wendell Odom. In Chapter 4, he discusses how IP defines three different network classes for addresses:  Class A, B and C. I understand that Class A, B, and C networks each have different length for the part that will identify the network. So, a Class-A network has a 1-byte long network part and 3 bytes for ... Read more