What is true about peer$-$to$-$peer networks? $($Select all that apply.$)$

Peer$-$to$-$peer networks can be utilized for file sharing and communication.

Client computers don't typically require any special setup to be part of a peer$-$to$-$peer network.

Since there isn't a centralized server, security isn't an issue on peer$-$to$-$peer networks.

Peer computers share the processing function of an application, but they may not always be available to the network.

Since there isn't a centralized server, the network is cheaper to setup and maintain.