Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Get The TCP/IP Guide for your own computer.
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
      9  TCP/IP Internet Layer (OSI Network Layer) Protocols
           9  Internet Protocol (IP/IPv4, IPng/IPv6) and IP-Related Protocols (IP NAT, IPSec, Mobile IP)
                9  Internet Protocol Version 6 (IPv6) / IP Next Generation (IPng)

Previous Topic/Section
IPv6 Datagram Size, Maximum Transmission Unit (MTU), Fragmentation and Reassembly
Previous Page
Pages in Current Topic/Section
1
2
Next Page
IP Network Address Translation (NAT) Protocol
Next Topic/Section

IPv6 Datagram Delivery and Routing
(Page 1 of 2)

IP functions such as addressing, datagram encapsulation and if necessary, fragmentation and reassembly, all lead up to the ultimate objective of the protocol: the actual delivery of datagrams from a source device to one or more destination devices.

Unchanged Aspects of Datagram Delivery and Routing in IPv6

Most of the concepts related to how datagram delivery is accomplished in IPv6 are the same as in IPv4:

  • Datagrams are delivered directly when the source and destination nodes are on the same network. When they are on different networks, delivery is indirect using routing to the destination's network, and then direct to the destination.

  • Routing is performed by looking at IP addresses and determining which portion is the network ID and which the host ID. IPv6 does this in the same basic way as in classless IPv4, despite the fact that IPv6 unicast addresses are assigned using a special hierarchical format.

  • Routing is still done on a next-hop basis, with sources generally not knowing how datagrams get from Point A to Point B.

  • Routing is performed by devices called routers that maintain tables of routes that tell them where to forward datagrams to reach different destination networks.

  • Routing protocols are used to allow routers to exchange information about routes and networks.

Previous Topic/Section
IPv6 Datagram Size, Maximum Transmission Unit (MTU), Fragmentation and Reassembly
Previous Page
Pages in Current Topic/Section
1
2
Next Page
IP Network Address Translation (NAT) Protocol
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.