Networks and Wireless systems.
Networks (NIC: Network Interface Cards, or Ethernet cards standard on most PCs.)
Two types of LAN systems:
1.
Peer-to-peer network
-each computer workstation
is equal to the others.
-are simple and economical to use but can only accommodate up to 8-9 computers.
2.
Client-server
network (network server).
- there is one main
computer which serves (file server) all of the other client computers in the
network (workstations or clients). They are faster, simpler to back-up and
work with Windows XP. They have a greater choice of security but are a harder
to maintain and cost more.
Wi-Fi, 802.11b, Wi-Fi
(Wireless Fidelity)
-A
wireless network that allows multiple users to share the same Internet
connection and files in small areas like homes and offices.
-Uses an
"access point" or base station that transmits the Internet connection or files
up to 300 feet over radio frequencies, and a Wi-Fi card (receiver) in
laptop or desktop. The technology is being built into many laptops and
hand-held device.
-802.11a 54 Megabits per second (Mbps)(not recommended)
-802.11b 11 Mbps most popular
-802.11g 54 Mbps popular, compatible with "b".-Wireless networks now found in most large hotels and some cafes.
Bluetooth: Bluetooth is another wireless technology, different from Wi-Fi. It's meant to replace computer cables with wireless connections over short distances, up to about 30 feet. It has been very slow to take off, but is useful for connecting a hand-held PC with a printer, or a laptop with a cellphone.
Wireless at home
DSL or cable modem Internet
connection.
Inexpensive Wireless Access Point. Acts as broadcast
and receiver base station for wireless network traffic.
Computer with wireless network device (e.g. Intel Centrino,
many others)
Once you have an Access Point in operation, wireless networking is enabled in its vicinity