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Binary Lesson 6 Classful Subnetting /24, /25, and /26

Binary Lesson 6 Classful Subnetting /24, /25, and /26. Class C /24. Class C Number of Addresses. Class C address: 192.168.1.0 /24 24 Network bits, 8 Host bits Network: 192.168.1.0 Broadcast: 192.168.1.255 Usable: 192.168.1.1 – 192.168.1.254 254 usable addresses 256 – 2 2^8 - 2. Class C.

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Binary Lesson 6 Classful Subnetting /24, /25, and /26

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  1. Binary Lesson 6Classful Subnetting/24, /25, and /26

  2. Class C/24

  3. Class CNumber of Addresses • Class C address: 192.168.1.0 /24 • 24 Network bits, 8 Host bits • Network: 192.168.1.0 • Broadcast: 192.168.1.255 • Usable: 192.168.1.1 – 192.168.1.254 • 254 usable addresses • 256 – 2 • 2^8 - 2

  4. Class C • Class C address: 192.168.1.10 /24 • The subnet mask is 255.255.255.0 • The network address is 192.168.1.0 • The broadcast address is 192.168.1.255 • In Binary: IP: 11000000 10101000 00000001 00001010 Sub Msk: 11111111 11111111 11111111 00000000 Net Addr: 11000000 10101000 00000001 00000000 Brdc Add: 11000000 10101000 00000001 11111111

  5. Whole Square is a /24 network Contains 256 addresses, only the first & last shown

  6. Dividing a Class Cinto Two /25 Subnets

  7. Divided into Two /25 Subnets

  8. 192.168.1.0 /25 • You can split a class C in half with a /25 • IP: 192.168.1.10 /25 • Subnet Mask: 255.255.255.128 • Network: 192.168.1.0 IP: 11000000 10101000 00000001 00001010 Sub Msk: 11111111 11111111 11111111 10000000 Net Addr: 11000000 10101000 00000001 00000000 NETWORK HOST BITS BITS

  9. 192.168.1.0 /25 • There are only 128 addresses in a /25 block • Network: 192.168.1.0 /25 • 1st Usable: 192.168.1.1 • Last Usable: 192.168.1.126 • Broadcast: 192.168.1.127 Net Addr: 11000000 10101000 00000001 00000000 First Use: 11000000 10101000 00000001 00000001 Last Use: 11000000 10101000 00000001 01111110 Broadcst: 11000000 10101000 00000001 01111111

  10. 192.168.1.128 /25 • There are only 128 addresses in a /25 block • Network: 192.168.1.128 /25 • 1st Usable: 192.168.1.129 • Last Usable: 192.168.1.254 • Broadcast: 192.168.1.255 Net Addr: 11000000 10101000 00000001 10000000 First Use: 11000000 10101000 00000001 10000001 Last Use: 11000000 10101000 00000001 11111110 Broadcst: 11000000 10101000 00000001 11111111

  11. Dividing a Class Cinto Four /26 Subnets

  12. Divided into Four /26 Subnets

  13. 192.168.1.0 /26 • There are only 64 addresses in a /26 block • Network: 192.168.1.0 /26 • 1st Usable: 192.168.1.1 • Last Usable: 192.168.1.62 • Broadcast: 192.168.1.63 Net Addr: 11000000 10101000 00000001 00000000 Sub Msk: 11111111 11111111 11111111 11000000 First Use: 11000000 10101000 00000001 00000001 Last Use: 11000000 10101000 00000001 00111110 Broadcst: 11000000 10101000 00000001 00111111

  14. 192.168.1.64 /26 • There are only 64 addresses in a /26 block • Network: 192.168.1.64 /26 • 1st Usable: 192.168.1.65 • Last Usable: 192.168.1.126 • Broadcast: 192.168.1.127 Net Addr: 11000000 10101000 00000001 01000000 Sub Msk: 11111111 11111111 11111111 11000000 First Use: 11000000 10101000 00000001 01000001 Last Use: 11000000 10101000 00000001 01111110 Broadcst: 11000000 10101000 00000001 01111111

  15. 192.168.1.128 /26 • There are only 64 addresses in a /26 block • Network: 192.168.1.128 /26 • 1st Usable: 192.168.1.129 • Last Usable: 192.168.1.190 • Broadcast: 192.168.1.191 Net Addr: 11000000 10101000 00000001 10000000 Sub Msk: 11111111 11111111 11111111 11000000 First Use: 11000000 10101000 00000001 10000001 Last Use: 11000000 10101000 00000001 10111110 Broadcst: 11000000 10101000 00000001 10111111

  16. 192.168.1.192 /26 • There are only 64 addresses in a /26 block • Network: 192.168.1.192 /26 • 1st Usable: 192.168.1.193 • Last Usable: 192.168.1.254 • Broadcast: 192.168.1.255 Net Addr: 11000000 10101000 00000001 11000000 Sub Msk: 11111111 11111111 11111111 11000000 First Use: 11000000 10101000 00000001 11000001 Last Use: 11000000 10101000 00000001 11111110 Broadcst: 11000000 10101000 00000001 11111111

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