IP Addressing and Subnetting Basics
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Brief keynote presentation on basic IPv4 IP Addressing and lead into subnetting for the San Diego Cisco User Group.
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IP Addressing and Subnetting Basics
- 1. IP ADDRESSING & SUBNETTING BASICS SDCUG
- 2. Rowell Dionicio IT Manager at Infracore CCNA rowelldionicio@gmail.com @rowelldionicio rowelldionicio.com
- 3. Steven King Network Planning Engineer NPE II at AT&T Government Solutions, Inc. CCNA, Network + www.networks-wetworks.com YouTube: NetworksWetworks steve@networks-wetworks.com LinkedIn: http://www.linkedin.com/in/steveking09
- 5. What’s in an IP Address? 183.53.225.3
- 6. 10110111 00110101 11100001 00000011
- 7. 10110111 00110101 11100001 00000011
- 8. 10110111 00110101 11100001 00000011 32 bit binary
- 9. 10110111 00110101 11100001 00000011
- 10. 10110111 00110101 11100001 00000011
- 11. 10110111 00110101 11100001 00000011 4 Octets
- 12. 00110101 10110111 00110101 11100001 00000011
- 13. 00110101 10110111 00110101 11100001 00000011 8 Bits * 4 octets = 32 bits
- 14. Converting to Binary 163
- 15. Converting to Binary 163 Base 27 26 25 24 23 22 21 20 Place Value 128 64 32 16 8 4 2 1 Remainder 35 - 3 - - - 1 0 Binary 1 0 1 0 0 0 1 1
- 16. Converting to Binary 163 Base 27 26 25 24 23 22 21 20 Place Value 128 64 32 16 8 4 2 1 Remainder 35 - 3 - - - 1 0 Binary 1 0 1 0 0 0 1 1
- 17. Converting to Binary 163 Base 27 26 25 24 23 22 21 20 Place Value 128 64 32 16 8 4 2 1 Remainder 35 - 3 - - - 1 0 Binary 1 0 1 0 0 0 1 1
- 18. Converting to Binary 163 Base 27 26 25 24 23 22 21 20 Place Value 128 64 32 16 8 4 2 1 Remainder 35 - 3 - - - 1 0 Binary 1 0 1 0 0 0 1 1
- 19. Classful Network Architecture Net Host # of # of Class Range Class A, B, C ID ID Networks Hosts 27 = No scalability A 0 - 127 a b.c.d 128 224 - 2 Wasted IP addresses B 128 - 191 a.b c.d 214 = 16, 384 216 - 2 221 = Private IP addresses C 192 - 223 a.b.c d 2, 097, 28 - 2 152
- 20. Private IP Addresses Start End Class A 10.0.0.0 10.255.255.255 Class B 172.16.0.0 172.31.255.255 Class C 192.168.0.0 192.168.255.255
- 21. Subnetting Resources Appendix G of Cisco Press ICND1 book
- 22. Subnetting Resources Appendix G of Cisco Press ICND1 book
- 23. Subnetting Resources Appendix G of Cisco Press ICND1 book And additional Appendixes of ICND1 book
- 24. Subnetting Resources networking-forum.com
- 25. Subnetting Resources networking-forum.com
- 26. WHITE BOARD
Hinweis der Redaktion
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- We will use this IP address as an example. 183.53.225.3.\nI can tell you that this is a Class B address. We’ll get into classes in a bit. It’s a routable address on the internet.\nAn IP address is used to uniquely identify a device on the interwebz.\n\n
- This is that same IP address in the previous slide converted into binary.\nAn IP address is a 32 bit address.\nLet’s work backwards to figure out how a decimal IP address is a 32 bit binary address.\n
- This is that same IP address in the previous slide converted into binary.\nAn IP address is a 32 bit address.\nLet’s work backwards to figure out how a decimal IP address is a 32 bit binary address.\n
- An IP address can be broken out into 4 Octets. \nEach octet is 1 byte. Each octet you see here represents the 4 sections of a decimal address in binary.\n
- An IP address can be broken out into 4 Octets. \nEach octet is 1 byte. Each octet you see here represents the 4 sections of a decimal address in binary.\n
- An IP address can be broken out into 4 Octets. \nEach octet is 1 byte. Each octet you see here represents the 4 sections of a decimal address in binary.\n
- An IP address can be broken out into 4 Octets. \nEach octet is 1 byte. Each octet you see here represents the 4 sections of a decimal address in binary.\n
- An IP address can be broken out into 4 Octets. \nEach octet is 1 byte. Each octet you see here represents the 4 sections of a decimal address in binary.\n
- 1 byte is 8 bits. So each octet has 8 bits and there are 4 octets. 8 multiplied by 4 gives us 32 bits.\n
- The first row is your base values.\n\nThe second row are your magic numbers. Binary is a base-2 number system. These numbers are based on the power of 2.\n\n2^0 = 1. 2^1 = 2. 2^2 = 4. Etc\n\nThe third row contains our remaining value for converting decimal to binary. Which we get the value on the bottom row.\n
- The first row is your base values.\n\nThe second row are your magic numbers. Binary is a base-2 number system. These numbers are based on the power of 2.\n\n2^0 = 1. 2^1 = 2. 2^2 = 4. Etc\n\nThe third row contains our remaining value for converting decimal to binary. Which we get the value on the bottom row.\n
- The first row is your base values.\n\nThe second row are your magic numbers. Binary is a base-2 number system. These numbers are based on the power of 2.\n\n2^0 = 1. 2^1 = 2. 2^2 = 4. Etc\n\nThe third row contains our remaining value for converting decimal to binary. Which we get the value on the bottom row.\n
- The first row is your base values.\n\nThe second row are your magic numbers. Binary is a base-2 number system. These numbers are based on the power of 2.\n\n2^0 = 1. 2^1 = 2. 2^2 = 4. Etc\n\nThe third row contains our remaining value for converting decimal to binary. Which we get the value on the bottom row.\n
- IP addresses are most known for their classful network design. \nThis is now obsolete as it doesn’t scale. Obviously, because of the depletion of IPv4 and the migration to IPv6.\nThis architecture wasted a lot of IP addresses. \nVLSM, variable length subnet masking, came along to help allocate IP addresses more efficiently with prefix lengths.\nEach class has its own private IP address range which is used inside private networks. \n
- Most people are familiar with the Class C private address. It’s used within home networks. \nThese private addresses are not routable on the Internet.\n
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