Come watch this short and informative video by Todd Lammle on IPv4 and IPv6 headers. Learn why IPv6 is such a great routed protocol and why the header used in Internet Protocol Version 6 (IPv6) is all-around better than Internet Protocol Version 4 (IPv4) and why.
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- [Narrator] There are some key differences…in an IPv6 header.…So let's go ahead and take a look at our IPv4 header again.…First you must remember an IPv4 header format…can vary in length.…IPv6 does not.…This is 20 octets in length…compared to IPv6's minimal 40 octets…compared to how large that address space is.…Now we want to remember a couple things.…We have our total length, our type of service,…our protocol field which defines…who owns this data we're carrying.…
Time to live field and our source and destination address.…We also have a fragment offset…because we're going to possibly fragment our IPv4 headers.…Now the basic IPv6 header contains eight fields,…making it only twice as large as an IP header…at only 40 bytes.…Right. Now remember, this could not vary,…so it's more efficient.…Now, so which header do you think, by looking at this,…is equivalent to the time to live field?…Well remember the time to live field in IP version four,…told us how many routers we went through…or what was considered hops.…
So this is now called the hop limit,…
For more information on the CCENT exam, visit Cisco's website.
- Overview of internetworking
- The TCP/IP networking model
- Easy subnetting
- Managing Cisco IOS
- Managing Cisco networks and devices
- IP routing
- Layer 2 switching
- VLANs and InterVLAN routing
- Network address translation
Skill Level Intermediate
Internetworking devices4m 20s
3. Introduction to TCP/IP
4. Easy Subnetting
5. VLSM, Summarization, and Troubleshooting TCP/IP
6. Cisco Internetworking Operating System (IOS)
7. Managing a Cisco Internetwork
8. IP Routing
9. Layer 2 Switching
10. VLANs and InterVLAN Routing (IVR)
12. Network Address Translation (NAT)
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