Option B is correct. Without the aid of a centralized service provider, a group of users can build a communications infrastructure from the ground up using peer-to-peer apps.
In any model, any peer can access any resource that is offered by the network simply by getting in touch with the peer who is offering it. There are situations in which having a distinctive, enormously open network might be intriguing, even though it might be desired for some applications. These mechanisms should make it possible for peers to demonstrate their group membership to other group members so they can be given access to group resources and guarantee the security of message exchange and resource discovery between peer group members.
Learn more about network here-
https://brainly.com/question/14276789
#SPJ4