Sep 30

TCP/IP Version 6, What is New and Why is it Important

TCP/IP Version 6

IPv6 was introduced to counter the problem of shortage of IPv4 addresses. 32-bit IPv4 addressing was designed to give out 4.3 billion addresses, but with time, as computers became affordable, and more recently, as every digital device started supporting internet connectivity, the exhaustion of Ipv4 became inevitable. The solution to this was introduced in the form of Ipv6 at the 1994 Toronto IETF conference. An Ipv6 address is 128-bit long and can accommodate more addresses than anyone can even think of (3.4 x 10^38 to be precise), and would be able to solve the addressing issues for many decades to come.

In addition to being 128-bit long, it changed the number system used for addressing, from the decimal numbers, separated by period (.),  in an Ipv4, an Ipv6 address uses the hexadecimal format and the digits are separated by using a colon (:). At most, an Ipv6 address contains 32 hexadecimal digits (one hex digit per 4 bits). The subnet id of an Ipv4 got changed to the prefix in Ipv6. Unlike Ipv4, there is no concept of classes in Ipv6. Instead, Ipv6 uses a concept called Global Routing Prefix, which is assigned to the user along with the IP address. The concept of public addresses in Ipv4 was renamed to Global Unicast, and that of the private addresses was changed to Unique Local. And this global routing prefix helps in creating the subnets in Ipv6 addressing. A new type of address, called anycast, has been introduced in Ipv6 which can send messages to the nearest device on the network. The header used in Ipv6, though longer (40 bytes), is simpler than an Ipv4 header. In place of Ipv4 options in an Ipv4 address, there are extension headers in Ipv6, and a simpler header accelerates the communication.

In addition to the scalability offered by the Ipv6, by providing more number of addresses, an Ipv6 address provides better security with an end-to-end encryption capability. It does not use the Network Address Translation (NAT) protocol as well hence increasing the security. Even the IPSec is a mandatory part of Ipv6.  The use of a multicast address instead of a  broadcast address in an Ipv6 helps to save the bandwidth over a network. Auto-configuration ability IP addresses in Ipv6 by using the provided prefix and the MAC address of the device and using the EUI-64 format eases the implementation of the network. Therefore, we can conclude, that the use of Ipv6 not only helps with more addresses but also results in a simpler and more secure network.

List of top IT Certification

Looking for an IT Job?

Please call us on 1800 159 151, or complete the form below.

  • This field is for validation purposes and should be left unchanged.

Recent Posts

Can you get a job with just a CCNA certificate?

Can you get a job with just a CCNA certificate?

People often worry about getting jobs after acquiring a few years of education or a specific certificate. This is the exact situation with people who.. Read More →
Does a CCNA Certification help in getting Good Jobs?

Does a CCNA Certification help in getting Good Jobs?

The CCNA certificate will surely help you get in a better position right now. This certificate holds much power because of its course. It mainly.. Read More →

The supply of this course/package/program is governed by our terms and conditions. Please read them carefully before enrolling, as enrolment is conditional on acceptance of these terms and conditions. Courses run subject to registrations.


Find out why we are the leading choice to help boost your career in Australia

Prepare to get IT job ready in 8 weeks

Trained 10,000+ professionals and counting

Experienced Provider: Operating Since 2004

Trained staff from 1000+ Australian Businesses

We Have Placed Candidates In

Over 1000 organisations have relied on Logitrain to be their trusted training partner.

High-quality, cost-effective training in Australia
Learn More
  • OpenPay
  • This field is for validation purposes and should be left unchanged.

Dont’ Wait. Fill the form for a free no-obligation information session with our course specialists.

About The Author

Delivering Classroom and Live Virtual Training with Price Beat Guarantee

EOFY Offer: Book and pay for a course before 30 June. Attend training until 31 August.