Please Discuss What are hostbased clientbased clientserver cloudbased application architectures how the Web works how email works Explain any Peertopeer

Please Discuss
What are host-based, client-based, client-server, cloud-based application architectures
how the Web works
how email works
Explain any Peer-to-peer application example such as Napster, BitTorrent, etc
Pick at least Two from the following topics:
HTTP
POP
SMTP
IMAP
MIME
MPEG
SaaS
HaaS
PaaS
IaaS
H.323

Provide with example, showing the history, and the purpose of using each of these topics.