With connectionless packet switching, each packet includes complete addressing or routing information. In passing through connectionless-enabled networks, each packet is imprinted with: a destination address, a source address, as well as a packet sequence number. Functionally, this precludes the need for a dedicated path to aid the packet in navigating the network to its intended destination.
Datagram transmission across multiple IP networks
Packet switching is commonly employed to optimize available channel capacity in digital networks, to minimize transmission latency in message delivery and to enhance processing reliability in addressing modes.
IPv6 packet-switched addressing encompasses three general categories for transport:
- Unicast – protocol fields act as an identifier for a single interface (within the ambit of the unicast address type). An IPv6 packet sent to a Unicast address is delivered to the interface identified by that address.
- Multicast – protocol fields act as an identifier for a set of interfaces that can belong to different nodes. An IPv6 packet delivered to a Multicast address is delivered to the interfaces specified by the ambit indicators.
- Anycast – protocol fields act as identifiers for a set of interfaces that can belong to the different nodes. An IPv6 packet destined for an Anycast address is delivered to one of the interfaces identified by the protocol fields defined administratively.
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Post Note: “A Few Fundamental Features of IPv6 Internetworking – Part III” was originally published through Suite101.com under the title “A Few Fundamental Features of IPv6 Internetworking”