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CLASSLESS INTER-DOMAIN ROUTING {CIDR } & SUBNETTING

CLASSLESS INTER-DOMAIN ROUTING {CIDR } & SUBNETTING. JONATHAN BENNETT. NATHAN GRAMMES. PHILLIP LAFLEUR. STEP 1: CONNECT A BUNCH OF COMPUTERS. STEP 2: DEVELOP ADDRESS SYSTEM. Internet Protocol (IP) Address. 1981. CLASSFUL NETWORK ADDRESSING ARCHITECTURE.

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CLASSLESS INTER-DOMAIN ROUTING {CIDR } & SUBNETTING

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  1. CLASSLESS INTER-DOMAIN ROUTING{CIDR} & SUBNETTING JONATHAN BENNETT NATHAN GRAMMES PHILLIP LAFLEUR

  2. STEP 1: CONNECT A BUNCH OF COMPUTERS STEP 2: DEVELOP ADDRESS SYSTEM Internet Protocol (IP) Address 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  3. 11000000.10101000.00000101.10000010 BIT CONVERTER 192 . 168 . 5 . 130 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  4. 11000000.10101000.00000101.10000010 Octet Octet Octet Octet 32 Bits 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  5. STEP 1: CONNECT A BUNCH OF COMPUTERS STEP 2: DEVELOP ADDRESS SYSTEM Internet Protocol (IP) Address STEP 3: ASSIGN IP ADDRESSES ? 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  6. The CLASSFUL NETWORK (ABRIDGED) , representing available hosts A B C Assigned based on 3 classes, 254 65 THOUSAND 17 MILLION What if you only need 3,000? C CCCCCCCCCCC Cluttered routing table. B Waste 62,000+ addresses! 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  7. The CLASSFUL NETWORK (ABRIDGED) 70.1.0.0 70.2.0.0 70.0.0.0 70.3.0.0 70.4.0.0 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  8. 70.5.0.0 70.6.0.0 70.7.0.0 70.8.0.0 70.11.0.0 70.12.0.0 70.9.0.0 70.10.0.0 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  9. Available IP’s exhausted after 254 assignments of Class B. PROBLEM 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  10. INTERNET ENGINEERING TASK FORCE 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

  11. The SOLUTION (UNABRIDGED) SUBNETTING Let’s just divide our network into MANAGABLE bits. IP ADDRESS 192.168.5.130 NETWORK PREFIX 192.168.5 HOST NUMBER 0.0.0.130 HOST NUMBER 0.0.0.130 SUBNET 255.255.255.0 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  12. The SOLUTION (UNABRIDGED) SUBNETTING Let’s just divide our network into MANAGABLE bits. 192.168.5.130 Designates network prefix 255.255.255.0 192.168.5.0 0.0.0.130 255 = Entire Octet (0 – 254) or (in binary) Leading 1s and trailing 0s 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  13. The SOLUTION (UNABRIDGED) SUBNETTING Network prefix and host suffix can be found with binary operation AND. 1 AND 0 = 0 0 AND 0 = 0 1 AND 1 = 1 IP Address 11000000.10101000.00000101.10000010 AND Subnet Mask 11111111.11111111.11111111.00000000 Network Prefix 11000000.10101000.00000101.00000000 Host Number 00000000.00000000.00000000.10000010 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  14. The SOLUTION (UNABRIDGED) CIDR+SUBNETTING CIDR represents the notation in which subnetting is represented. IP / INITIAL BITS 192.168.5.130 / 24 11000000.10101000.00000101.10000010 192 . 168 . 5 . 130 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  15. The SOLUTION (UNABRIDGED) / 23 70.1.0.0 0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0 510 Hosts 70.1.0.0 – 70.1.1.254 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  16. The SOLUTION (UNABRIDGED) / 22 70.1.0.0 0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0 1020 Hosts 70.1.0.0 – 70.1.3.254 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  17. The SOLUTION (UNABRIDGED) / 21 70.1.0.0 0 1 0 0 0 1 1 0 . 0 0 0 0 0 0 0 1 . 0 0 0 0 0 0 0 0 . 0 0 0 0 0 0 0 0 2046 Hosts 70.1.0.0 – 70.1.7.254 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  18. The SOLUTION (UNABRIDGED) IMPLICATIONS 70.1.16.0 / 12 70.1.15.0 / 22 70.0.0.0 70.1.16.0 / 15 70.1.12.0 / 16 1993 CLASSLESS INTER-DOMAIN ROUTING AND SUBNETTING

  19. IP ‘division’ via subnetting allows for specific distribution of IPs AWESOME 1981 CLASSFUL NETWORK ADDRESSING ARCHITECTURE

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