The Internet o¤ered the possibility for the delivery of new services. Some
of these services were the provision of information. Some promised torationalize the supply chains of entire industries. Others o¤ered opportunitiesfor people to communicate and to help each other through online ommunities.
ommunications over a network are accomplished through the use of
networking protocols. To understand the purpose of networking protocols,
you should have a basic knowledge of the
OSI (Open Systems Interconnection)
. The OSI model is not an actual product. It is a theoretical model
that describes how networks work.