Understanding IP Addresses: Classes, Decimal Notation, and Address Space Division, Slides of Computer Networks

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COMPUTER

NETWORKS

Lecture-

Review Lecture 24

Addresses for Virtual Internet

The IP addressing Scheme

The IP Address Hierarchy

Original Classes of IP Addresses

Computing The Class Of An Address

Dotted Decimal Notation

 Dotted decimal notation is a syntactic form, the IP software uses to express 32-bit binary values when interacting with humans.

 Dotted decimal represent each octet in decimal and uses a dot to separate octets.

Classes And Dotted Decimal

Notation

 In class A the last three octets correspond to a host suffix.

 In Class B the last two octets are the host octets.

 Class C only has one octet to represent the host.

Classes And Dotted Decimal Notation

 The range of decimal values found in the first octet of each address class.

Division Of The Address Space

Authority For Addresses

 Throughout the internet, each network prefix is unique.

 Networks obtain their network numbers from their Internet Service Provider (ISP).

 The Internet service providers coordinate with The Internet Assigned Number Authority to obtain their network numbers.

lassful Addressing Example

Class B

Class A

Class B

Class C

Summary

 Computing the Class of an IP Address

 Dotted Decimal Notation

 Classes & Dotted Decimal Notation

 Division of the Address Space

 Authority For Address

 A Classful Addressing Example