IPv4 vs IPv6 | Difference Between IPv4 and IPv6?

What is IP address?

An IP address is a unique number or address used to identify your device on a network. Every device connected to the Internet must have an IP address to communicate with other devices.

IP address acts as a telephone number or a car registration plate. It shows ownership and location and allows a device to communicate and be located by other devices on the connected world wide web.

There are two types of IP address available in the network, IPv4 and IPv6. So, In this post, I’m going to show you some basic differences between IPv4 and IPv6.

Difference between IPv4 and IPv6:

S.No. Points IPv4 IPv6
1 Address size It has 32 bit address space It has 128 bit address space
2 Address format Dotted decimal notation, ex. Hexadecimal notation, ex. 3ffe:f200:0234:ab00:0123:3421:fda4:adb0
3 Checksum Checksum field is available No Checksum field
4 Packet size 576 bytes 1280 bytes
5 IP security support IP security support is optional IP security support is required
6 No. of the header field 12 8
7 Length of the header field 20 40
8 Communication It uses both multicast and broadcast No broadcast but uses different types of multicast
9 Security Les secure More secure compared to IPv4
10 Connection Connectionless Connection-oriented
11 Option field
Option field is available Option field is not available

IPv4 header format:

IPv4 header format

IPv6 header format:

IPv6 header format

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