Subtitles of the Movie

Now IPv6 is obviously quite different from IPv4, so it's going to take a bit of transition to get us from the IPv4 world to the IPv6. One of the main reasons is we have a new header format in the IP packet which means that the IPv4 routers aren't going to be able to read these packets, so your current IPv4 routers are either going to have to be upgraded or replaced to be able to function with IPv4. Now this means there's going to have to be a router upgrade required before moving to IPv6. Keep in mind that the entire Internet and the whole networking world right now, or 99.9 percent of it, is built on IPv4, so we're looking at a number of years to transition fully into IPv6, but it's already started and you're just going to see it continue. This could probably, is most likely, a really good place if you're looking for future career advancement. The people who understand and adopt and really wrap their head around IPv6 early on can create quite a nice job for themselves as the world slowly kind of gains steam on moving to IPv6, so the more about this you can understand the more it's going to help your career. Now there are four major technologies that'll help us transition because it's not like next July 3rd we're going to hit the switch and everything's going to IPv6; there's going to be this kind of ongoing transition and there are four major technologies out there right now that you could see mentioned on the exam and let's just mention these technologies for working in an IPv4/IPv6 world. There's next generation TCPIP; there's a technology called Intra-Site Automatic Tunnel Addressing Protocol, very easy to say I might add - ISATAP; then there's 6to4, I like that one, now that's a name you can really say, right, 6to4. And then there's Teredo. So let's look at each of these, OK? And this is, if you've got this you can pretty much answer their questions, OK? Next generation TCP IP is what's built into Windows Vista and Windows Server 2008. It's generating the IP addresses, it allows us to use them, it's kind of built into the software of Vista and Windows Server - it's the most fundamental type of transition technology. Now the next one is and notice the subtle difference in these, the Intra-Site Automatic Tunnel Addressing Protocol, ISATAP, is a tunneling protocol. Now what it's going to do is it's going to allow IPv6 and 4 to communicate so a version 4 network can communicate with a version 6 network through one of these ISATAP routers and what it's actually doing is it's encapsulating or tunneling IPv4 inside an IPv6 packet and then it's performing something like a NAT or a Network Address Translation type function to kind of determine when it needs to be in IPv4 and when it needs to be in IPv6. When it needs to be in IPv6 it grabs the version 4, puts it inside the 6 and sends it on. When it needs to be 4 it stops, unloads the 4, sends it on as a 4 address, okay? Now this is really intended for use inside a Private network so once you get inside your own Private network you would use that. Now, 6to4 is the same as ISATAP but it's designed for Public networks, meaning the Internet. Now, once again IPv4 gets encapsulated or tunneled into IPv6 and this technology requires 6to4 routers. So, if you're going to be working with an outside world public environment this IPv6 you'll need 6to4, some 6to4 routers. Teredo is a tunneling protocol once again and this allows clients behind a version 4 network address translator, or NAT technology on the routers, to use IPv6 on the Internet. Teredo is generally only used when there are no other IPv6 translations available. So, take these descriptions, use these to kind of step through the questions, again, if you've got some spare time and by spare time I mean that stuff that you're wasting every night right now between midnight and four - use that spare time to read about some of these transition technologies because this is going to be a pretty significant part of the world over the next few years as we kind of move and kind of morph from an IPv4 into an IPv6 universe. So there are your transition technologies.