Databases Reference
In-Depth Information
Figure 11-4
PC
Web Server
PC
PC
Database
Server
PC
“The Internet”
PC
PC
Database
PC
Internet connection with separate Web server.
With WiFi, the connection path is the radio frequency transmissions between
the computers.
The other part of this hardware connection is the physical network adapter
your computer uses to communicate. For traditional wired networks, this
means a network interface card (NIC), sometimes called a network adapter.
This provides the computer's physical connection to the network and handles
the low-level communication functions. Wireless networks use a network
adapter that is functionally a wireless transmitter/receiver that supports WiFi
connectivity.
The connection could also be made through a dial-up modem, cable modem,
or other connection device for remote connectivity. A
modem
is a device that con-
verts digital data to an analog signal for transmission and then back to digital
