10 Facts That You Need To Know About IPv6

By Chiprang.com There is no doubt that IPv6 has been advancing toward the mainstream. However, because IPv6 is so dissimilar to IPv4, the...

By Chiprang.com

There is no doubt that IPv6 has been advancing toward the mainstream. However, because IPv6 is so dissimilar to IPv4, there is much confusion when it comes to making the transition. Below are ten tips to better understand how IPv6 works.

1.Many systems already use IPv6. Microsoft began installing it with Windows Vista, enabling it by default. Because the Windows version is designed to self-configure, computers broadcast IPv6 traffic without notice. However, since not all routers and switches support IPv6, in some cases, it will still be necessary to use IPv4 regardless.

2. IPv6 can move through IPv4 networks. IPv6 is generally incompatible with IPv4 networks. However, various transition technologies, such as 6to4 and Teredo have been developed to tunnel through to enable compatibility across networks.

3. It is easy to identify link local unicast addresses. IPv6 classifies some of its headers for distinct addresses. For example, the address always begins with FE80 for link local unicast addresses.

4. IPv6 is not fully supported by Windows. As much as Microsoft has jumped on the IPv6 bandwagon, it is surprising that it is not fully supported by Windows. For instance, including IPv4 addresses within Universal Naming Conventions is allowed, however, it is not with IPv6 addresses since Windows reads colons as drive letters. Microsoft has made some workarounds for these issues, however, it is doubtful that all of them have been addressed.

5. IPv6 addresses are very different. IPv4 addresses consist of four numbers combined for a 32-bit address. IPv6 addresses are comprised of hexadecimal characters that are each 128 bits long.

6. IPv6 addresses suppress zeros. IPv6 addresses often include many zeros because of their length. The zeros at the beginning of IPv6 addresses function merely as place holders.

7. Sometimes IPv6 suppresses inline zeros. IPv6 addresses can include a great many zeros. Only sections with zeros are suppressed. Therefore, the second part of an address will keep zeros that trail after other letters or numbers. Also, each address may only contain one double colon.

8. Loopback addresses do not appear as regular addresses. IPv4 designated loopback addresses point to local machines as 127.0.0.1. Since the IPv6 loopback address suppresses zeroes, there may be as little as one number representing it.

9. Subnet masks are not required. IPv4 addresses include corresponding subnet masks. Even though IPv6 uses subnets, their IDs are not evidenced in the address. The first 48 bits in an IPv6 address constitutes the network prefix, after which the subnet ID is comprised in the following 16 bits. The final 64 bits constitute the interface identifier, or Interface or Device ID.
10. DNS remains a valid technology. In IPv4, host records map IP addresses to a specific host name.

However, IPv6 uses AAAA resource (Quad A) records instead of actual host records. The ip6.arpa domain is used for the purpose of resolving host name reversal.
While the adoption of IPv6 appears to be going at a slow pace, it is nonetheless, inevitable. Therefore, keeping in mind the above tips could be useful in making the transmission, as it is desired or becomes necessary.

The facts were provided by the PackNet Manchester VoIP Blog – A blog about everything VoIP.

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10 Facts That You Need To Know About IPv6
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