IP Addressing Basics

1. IP Addressing Basics NAD710 Introduction to Networking Using Linux Portions of this presentation are from the online text Linux Network Administrators Guide January 20,2002 Professor Tom Mavroidis

9. Private IP Addresses Table 2-1. IP Address Ranges Reserved for Private Use Class Networks A 10.0.0.0 through 10.255.255.255 B 172.16.0.0 through 172.31.0.0 C 192.168.0.0 through 192.168.255.0 RFC 1918

10. Example Network From Text

14. IPv4 addresses are expressed in dotted decimal notation. For example, a 32-bit address may look like this in binary:

15. We convert each eight-bit block to decimal and separate the decimal values with periods or “dots”. The converted IPv4 address, expressed as a dotted decimal address, is:

16. Class A The largest grouping of addresses is the class A group. Class A network addresses can be identified by a unique bit pattern in the 32bit address.

17. Class B The next grouping of addresses is the class B group. Class B network addresses can be identified by a unique bit pattern in the 32-bit address.

18. Class C The next grouping of addresses is the class C group. Class C network addresses can be identified by a unique bit pattern in the 32bit address.

19. Each of the three IP address classes has these characteristics

20. A device connected to a network may have one or many networking interfaces that require an IP address.

21. Devices with more than one interface are called multihomed , and the process is called multihoming

22. The process of providing more than one IP address on an interface is often called multinetting or secondary addressing . interface ethernet 0 ip address 183.55.2.77 255.255.255.0 ip address 204.238.7.22 255.255.255.0 secondary ip address 88.127.6.209 255.255.255.0 secondary

23. Class A Subnet Table

24. Class B Subnet Table

25. Class C Subnet Table