---
title: "What is different between IPv4 and IPv6 ?"  
description: "What is different between IPv4 and IPv6 ?"  
author: "Anonymous User"  
published: 2018-09-20  
updated: 2018-10-11  
canonical: https://www.mindstick.com/forum/34676/what-is-different-between-ipv4-and-ipv6  
category: "internet"  
tags: ["internet"]  
reading_time: 2 minutes  

---

# What is different between IPv4 and IPv6 ?

[IPv4 and IPv6](https://answers.mindstick.com/qa/113662/what-is-an-ip-address-explain-the-difference-between-ipv4-and-ipv6)

## Replies

### Reply by Anonymous User

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| **SrNo.** | **IPv4(Internet Protocol version 4)** | **[IPv6](https://answers.mindstick.com/qa/30580/what-is-ipv6)(Internet Protocol version 4)** |
| --- | --- | --- |
| **1.** | The Address space is 32 bits. | The address space is 128 bits. |
| **2.** | Into the ip4 is used 4 bytes for each address in the Header. | And Into the ip4 is used 16 bytes for each address in the Header. |
| **3.** | The header's length capacity is 20 bytes. | The header's length capacity is 40 bytes. |
| **4.** | The number of Header field is 12 in ip4. | The number of Header field is 8 in ip6. |
| **5.** | Internet Protocol Security (IPSec) with respect to network security is optional. | Internet Protocol Security (IPSec) with respect to network security is mandatory. |
| **6.** | Checksum field used to measure the error in the header, required. | Checksum field eliminated from the header as the error in the IP header are to very crucial. |
| **7.** | Released in 1981 | Released in 1999 |

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| ![What is different between IPv4 and IPv6 ?](https://www.mindstick.com/mindstickforums/efe06266-4569-4854-bb27-36d2ae8ccff8/images/e6b288de-83a9-4545-9526-0a8f5e9a1880.gif)\ | ![What is different between IPv4 and IPv6 ?](https://www.mindstick.com/mindstickforums/efe06266-4569-4854-bb27-36d2ae8ccff8/images/48488df1-2153-4f60-b48d-713e433af44c.png)\ |
| --- | --- |

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Original Source: https://www.mindstick.com/forum/34676/what-is-different-between-ipv4-and-ipv6

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