In the SSM service model, in addition to the receiver expressing interest in traffic " to " a multicast address, the receiver expresses interest in receiving traffic " from " only one specific source sending to that multicast address.
32.
With such an assignment it is possible to embed the unicast address prefix into the IPv6 multicast address format, while still providing a 32-bit block, the least significant bits of the address, or approximately 4.2 billion multicast group identifiers.
33.
Also, some address ranges are considered special, such as link-local addresses for use on the local link only, Unique Local addresses ( ULA ), as described in RFC 4193, and solicited-node multicast addresses used in the Neighbor Discovery Protocol.
34.
The node joins the " solicited-node " multicast address for the tentative address ( if not already done so ) and sends neighbor solicitations, with the tentative address as target address and the unspecified address ( : : / 128 ) as source address.
35.
If a switch does not understand multicast addresses then it will flood that traffic to all the members of a LAN; in this case the system's network card ( or operating system ) has to filter the packets sent to multicast groups they are not subscribed to.
36.
In particular, in multicast socket networking, an example of promiscuous traffic is when a socket configured to listen on a specific multicast address group A with a specific port P, noted A : P, receives traffic from A : P but also from another multicast source.
37.
IPv6 addresses are classified by three types of networking methodologies : unicast addresses identify each network interface, anycast addresses identify a group of interfaces, usually at different locations of which the nearest one is automatically selected, and multicast addresses are used to deliver one packet to many interfaces.
38.
Interoperability profiles ( EPIs ) are provided in ANSI E1.17 for initial service discovery in a system; for allocation of multicast addresses when used on UDP and IPv4; for UDP port allocation when multicasting, for IP address assignment in conformant systems, for protocol timeouts in specific environments and so on.
39.
The multicast address is 224.0 . 1.2, making this only the third multicast application to receive an address assignment, with only the VMTP protocol ( 224.0 . 1.0 ) and the Network Time Protocol ( 224.0 . 1.1 ) having arrived first.
40.
This session is specified to last for two hours using NTP timestamps, with a connection address ( which indicates the address clients must connect to or-when a multicast address is provided, as it is here-subscribe to ) specified as IPv4 224.2 . 17.12 with a TTL of 127.
