1 What is the primary reason for development of IPv6?

Answer 1

First, IPv4 is limited in the number of addresses. When it was developed, 4 billion addresses seemed more than sufficient, but that was before the days of ubiquitous personal computers, smart phones, and even the World Wide Web. Now there are millions of web servers on the internet, and billions of people. Every device needs a unique address (this isn't strictly accurate - firewalls, NAT, proxy servers and connection sharing helps some). It is estimated that IP address for the Internet will "run out" within a year.

IPv6 is a 128-bit address scheme, allowing for 3,400,000,000,000,000,000,000,000,000,000,000,000,000 addresses. That's 6,500,000,000,000,000,000,000,000 addresses for every square meter on Earth.

Next, IPv4 provides no facility for good security. Some techniques have been used to layer security protocols on top of TCP, but IP spoofing, man-in-the-middle attacks, and other hacks still leave network connections vulnerable.

There are other reasons as well, but I'll let someone else address those.

Answer 2

IPv6 is required because of the fast depletion of IPv4 addresses. IPv6 will enhance security of the TCP/IP stack, but most importantly increase the number of IP addresses available to use. This will essentially remove the need for network address translation (NAT).

Answer 3

The main problem with IPv4 is that there is not enough addresses. Another problem that was found with the current system (that is, with IPv4) is that routing tables were increasing dramatically. Right now, the largest routers (at the core of the Internet) already have to manage routes about a quarter million different networks - and this number continues increasing.

The main problem with IPv4 is that there is not enough addresses. Another problem that was found with the current system (that is, with IPv4) is that routing tables were increasing dramatically. Right now, the largest routers (at the core of the Internet) already have to manage routes about a quarter million different networks - and this number continues increasing.

The main problem with IPv4 is that there is not enough addresses. Another problem that was found with the current system (that is, with IPv4) is that routing tables were increasing dramatically. Right now, the largest routers (at the core of the Internet) already have to manage routes about a quarter million different networks - and this number continues increasing.

The main problem with IPv4 is that there is not enough addresses. Another problem that was found with the current system (that is, with IPv4) is that routing tables were increasing dramatically. Right now, the largest routers (at the core of the Internet) already have to manage routes about a quarter million different networks - and this number continues increasing.

Answer 4

"Because we will lose all IPv4 IP's when they run out."

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I'm not sure what the respondent was trying to say here, but it doesn't come across as accurate.

The reality is that the TCP/IP addressing scheme (version 4) is limited. There are 4 "octets", comprised of 8 computer bits (ons or offs), that convert to numbers between 0 and 255, each separated by a "dot." For example,

192.168.2.1

If we did the math on all possible permutations of these four numbers (0.0.0.0 through 255.255.255.255) you can easily see that there are a limited number of possible adresses. And this number is fast being approached, even though some addresses are re-used for limited duration, as in so-called "dynamic" addressing.

With IPv6, this number has been increased substantially. It is no longer limited by 4 octets. IPv6 promises dramatically more addresses for the future, though addressing complexity had to be increased to do it.

Note that IPv4 and IPv6 were made to coexist with one another relatively seamlessly. Hence, we won't "lose all IPv4 IP's [addresses] when they run out."

Answer 5

The main problem with IPv4 is that there is not enough addresses. Another problem that was found with the current system (that is, with IPv4) is that routing tables were increasing dramatically. Right now, the largest routers (at the core of the Internet) already have to manage routes about a quarter million different networks - and this number continues increasing.

Answer 6

The internet was expanding so rapidly that it would run out of unique IP addresses.

Answer 7

expanded addressing capabilities