Specifications

75
PC Performance
www.vivanco.com
PC Performance
Wireless LAN
The terms “WLAN” or “wireless LAN” refer to the technology and products needed to integrate
computers, PDAs, smartphones, multimedia servers or games consoles into a local area network
WITHOUT CABLES. Often it is not possible to install network cables in buildings, e.g. rented flats
(see system example I).
WLAN is the solution to this problem: computers and WLAN compatible devices can be arranged
throughout buildings fully flexibly. The devices are even connected to each other, with network
printers, memory devices and the internet through walls. When using notebooks or PDA, freedom
is unlimited and there are no longer any cables to limit mobility (see system example II).
Internet in the whole house:
Online shopping.
Online banking
Media datenbank
IEEE 802.11b based networks are sufficient
for occasional internet surfing with no
major download requirement.
IEEE 802.11g based networks are sufficient
for normal applications such as internet.
e-mail or transmitting audio streams*.
*Mbps = million bits per seconds
*MBps = million bytes
per seconds; 8 Bit = 1 Byte;
*Streams = simultaneous transfer and reproduction of media data
Speed of WLAN networks:
All WLAN technology is based on the IEEE 802.11 standard.
There are currently 2 subordinated standards which defined the basic
speeds for this 2.4 GHz radio technology.
The IEEE 802.11b standard provides a gross data transfer rate of up to
11 Mbps* fo which approximately up to 1.4 MBps* can be transferred
with the protocol technology. i.e. the content of a floppy disk per second.
The IEEE 802.11g standard provides 54 Mbps* gross data transfer rate of
which only 27 Mbps is useable for data.
This is roughly equivalent to the content of 3 floppy disks per second.
E
E
F
Cellar
Study
D
C
BA
Parlour Garden
G
F
H
E
I
G
Cellar
Study
D
C
BA
Parlour
Garden
E
A : Domestic telephone line
B : Splitter
C : DSL modem
D : WLAN router
E : Desktop PC with WLAN
capability
F : Notebook
G : PDA/SMARTPHONE
Z : Printer with PrintServer
I : NAS = Network attached
storage
System example I
System example II
802.11g
6x 1,4 MB/s
802.11b
1,4 MB/s
06 PC Perf-2 09 uk:06 PC Perform_2_06 11.08.2009 19:18 Uhr Seite 75