FF05 multicast scope is used for which level of communication?

The FF05 multicast address corresponds to the site-local scope, which is specifically designed for communication within a site or organization. This scope allows devices to communicate with one another over a local network, supporting multicast transmission for applications that operate within a defined geographical or administrative boundary.

Site-local addresses were used to facilitate efficient communication among nodes within a specific site without the need for routing across the wider Internet. This limits their reach to the local site, providing a way to manage multicast traffic internally and ensure that it does not interfere with external communication.

In contrast, addresses with local scope would operate on a single link, global scope would allow internet-wide communication, and interface-local scope would limit communication to a single interface on a host. Therefore, the FF05 multicast address is correctly associated with site-local communication because it facilitates multicast traffic within a specific organization or site while restricting external access.