IP Addressing Guide (IPv4 & IPv6 Addressing)

The IP address is the third layer address in TCP/IP Protocol Stack, given to each device connected to a network. In Internet layer of TCP/IP Protocol Stack, each device in a network is assigned with a unique address known as IP address. There are two versions of TCP/IP: IPv4 and IPv6. Right now we are using IPv4 version to assign a logical address to devices in a network. In this tutorial, you will learn the differences between IPv4 addressing and IPv6 addressing with different classes of IPv4 addresses.

Differences Between IPv4 and IPv6

1. Length
   
   IPv4 is 32-bit address broken into four octets which are separated by a period. IPversion6 is 128-bit long address having the capability to give more addresses than IPversion4 offers. Examples of IPversion4 and IPversion6 addresses are given below.
   
   IPversion4 addressing : 10.0.0.1 or in binary form 00001010 00000000 00000000 00000001
   IPv6 addressing : E3D7:0000:0000:0000:51F4:9BC8:C0A8:6420
   
   
2. Representation
   
   IPv6 is a 128-bit binary number represented in hexadecimal format. IPv4 is a 32-bit binary number represented in decimal format.
   
   
3. The capacity of possible addresses
   
   IPv6 can give more addresses than IPv4 addressing.
   
   
4. Checksum field
   
   In IPv4 addressing header, we can see checksum field but that is absent in IPv6 address header.
   
   
5. Protocols Supported
   
   Another major difference between IPv4 addressing and IPv6 addressing is the supported protocols. IPversion4 supports ARP and IGMP. IPv6 support NDP and MLD.
   

Uses of Netstat Command	Transport Layer in a Network
PING: Transmit failed. General Failure	Destination Net Unreachable
Destination host unreachable	Enable Disabled Adapter
Windows Automatic IP Address	Hard Disk SMART Command Failed

Different Classes of IP Addresses

IPv4 addresses are divided into five classes. They are:

1. Class A addresses(Range from 1 to 126)
   
   
2. class B addresses (Range from 128 to 191)
   
   
3. Class C addresses (Range from 192 to 223)
   
   
4. class D addresses (Range from 224 to 239)
   
   
5. Class E addresses (Range from 240 to 254)
   

Suggested Tutorials

1. Address Resolution Protocol (ARP)
   
   
2. Internet Group Management Protocol (IGMP)
   
   
3. Remote Procedure Call (RPC)
   
   
4. Dynamic Host Configuration Protocol (DHCP)

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Ping Request Could not Find Host
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