Everything About Ip Addressing
Submitted by: Submitted by Augustus2675
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Words: 22131
Pages: 89
Category: Science and Technology
Date Submitted: 10/21/2016 10:25 PM
W H I T E PA P E R
Understanding
IP Addressing:
Everything You
Ever Wanted To
Know
Understanding IP Addressing: Everything
You Ever Wanted To Know
CONTENTS
Internet Scaling Problems
1
Classful IP Addressing
3
Subnetting
7
Variable Length Subnet Masks (VLSM)
18
Classless Inter-Domain Routing (CIDR)
31
New Solutions for Scaling the Internet Address Space
39
IPv6 Resolves IPv4 Issues
42
Additional IPv6 Features
49
Keeping Current on Internet Addressing Issues
50
Appendix A - References
52
Appendix B - Classful IP Addressing
55
Appendix C - Subnetting Exercises
57
Appendix D - VLSM Exercise
61
Appendix E - CIDR Exercises
66
III
Understanding IP Addressing:
Everything You Ever Wanted To Know
The Internet continues to grow at a phenomenal rate. This is reflected in
the tremendous popularity of the World Wide Web (WWW), the opportunities that businesses see in reaching customers from virtual storefronts,
and the emergence of new ways of doing business. It is clear that expanding
business and public awareness will continue to increase demand for access
to resources on the Internet.
Internet Scaling Problems
Over the past few years, the Internet has experienced two major scaling
issues as it has struggled to provide continuous and uninterrupted
growth:
• The eventual exhaustion of IP version 4 (IPv4) address space
• The need to route traffic between the ever increasing number of net-
works that comprise the Internet
The first problem is concerned with the eventual depletion of the IP
address space. IPv4 defines a 32-bit address which means that there are
only 232 (4,294,967,296) IPv4 addresses available. As the Internet continues to grow, this finite number of IP addresses will eventually be
exhausted.
The address shortage problem is aggravated by the fact that portions of
the IP address space have not been efficiently allocated. Also, the traditional model of classful addressing does not allow the address space to
be used to its maximum...
