Internet service providers (ISPs)
which, in turn, are linked to larger
ISPs with connection to the major national and international infrastructure or
backbones
A short introduction to Internet technology
Client– server
The client– server
architecture consists of
client computers, such as
PCs, sharing resources
such as a database stored
on more powerful server
computers.
Figure 3.3
A fi ve- layer model of digital business infrastructure
I
Digital business
services – applications
layer
II
Systems software layer
III
Transport or
network layer
IV
Storage/physical
layer
CRM, supply chain
management, data mining,
content management systems
Web browser and server software and
standards, networking software and
database management systems
Physical network and
transport standards (TCP/IP)
Permanent magnetic storage on web
servers or optical backup or temporary
storage in memory (RAM)
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