"That is, systems can create a specific multicast group for a particular application (a videoconference, for example) and then release that group once the application ends."

--IP Switching and Routing essentials

I swear this was the nearest book.

Anyhow, the instructions, pulled from our favourite Ozzie Tim's journal:

1. Grab the nearest book.

2. Open the book to page 23.

3. Find the fifth sentence.

4. Post the text of the sentence in your journal along with these instructions.