Define IP address. Why do we need this address? Compare IPv4 address with IPv6 address.

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IP address is a unique address to identify the device on the internet or on local network. IP stands for “Internet Protocol” . It allows a system to recognized by other systems connected via internet protocol. There are two types of IP address.

  1. IPv4
  2. IPv6

We need IP address because IP address are the identifier that allows information to be sent between devices on the network. They contain location information and make device accessible for communication. Internet needs IP address to differentiate the different computers, routers and websites.

IPv4 is the version 4 of internet protocol and IPv6 is the version 6 of internet protocol. IPv6 is the latest version of internet protocol. The difference between the IPv4 and IPv6 are given below

IPv4 IPv6
It has 32-bit address length It has 126-bit address length
It supports Manual and DHCP address configuration It supports auto and renumbering address configuration
In IPv4, end to end connection is unachievable. In IPv6, end to end connection is achievable.
Security feature is depend upon application Security Feature is the inbuilt in IPv6 which is called IPSEC.
Address representation is in decimal format Address representation is in hexadecimal format
Packet flow identification is not available in IPv4 Packet flow identification is available in IPv4
checkfieldsum is not available in IPv4 checkfieldsum is available in IPv4
Encryption and Authentication facility are not provided in Ipv4 Encryption and Authentication facility are provided in Ipv4
IPv4 has header of 20-60 bytes IPv6 has header of 40 bytes fixed
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