The document requests a discussion on various application architectures including host-based, client-based, client-server, and cloud-based systems, as well as an explanation of how the web and email function. It asks for examples of peer-to-peer applications and requires coverage of at least two topics from a specified list, including relevant history and purposes. The focus is on understanding these technologies in a comprehensive manner.

1. 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

2. PaaS
IaaS
H.323
Provide with example, showing the history, and the
purpose of using each of these topics.