Chapter 7. Multicast Addresses
This chapter discusses IPv6 multicast addresses (see Figure 7-1). Multicast is a technique in which a device sends a single packet to multiple destinations simultaneously (one-to-many), in contrast to a unicast address, which sends a single packet to a single destination (one-to-one). Multiple destinations can actually be multiple interfaces on the same device, but they are typically different devices. Multicast is not new to IPv6; it has been available in IPv4 since 1988.
Figure 7-1 Multicast Addresses
A multicast address is used to send a single packet or, more likely, a single stream of packets to multiple devices ...
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