FRITZ WLAN-7340 Router Manual PDF (Setup & Configuration Guide)

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More about WLAN

126

2

More about WLAN

WLAN (Wireless Local Area Network) is a radio technology that allows

networks and access to the Internet to be provided without cable

connections. This allows multiple users to share one wireless Internet

connection.

2.1

Standards

The WLAN standards IEEE 802.11a, IEEE 802.11b,

IEEE 802.11g, IEEE 802.11n and IEEE 802.11i were devel-

oped by the Institute of Electrical and Electronic Engineers

(IEEE).

The standards IEEE 802.11a, IEEE 802.11b, IEEE 802.11g

and IEEE 802.11n define the transmission rate within a

wireless LAN. The IEEE 802.11i standard is a security stan-

dard.

Standards for the Throughput Rate

Data Throughput

The FRITZ!Box supports your choice of the standards

IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and

IEEE 802.11n. WLAN adapters based on one or more of

the standards listed can be used for WLAN connections

with the FRITZ!Box.

The standards are intended for different frequency bands.

The throughputs listed differentiate between gross and

net transmission rates. The net speed describes the trans-

mission rate of the user data.

Standard

Frequency Band

Gross Data Throughput up to

Net Data Throughput up to

802.11a

5 GHz

54 Mbit/s

25 Mbit/s

802.11b

2.4 GHz

11 Mbit/s

5 Mbit/s

802.11g

2.4 GHz

54 Mbit/s

25 Mbit/s

802.11n

2.4 / 5 GHz

300 Mbit/s

100 Mbit/s

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127

Standards for the Throughput Rate

Range

The range within a WLAN is highly dependent on the fol-

lowing factors:

•

the WLAN adapter used

•

the structural conditions

•

the amount of radio traffic on the same frequency

band. Other wireless networks may be active, but al-

so microwave ovens, baby monitors, game consoles,

garage door openers, audio-video bridges, or Blue-

tooth transmitters (for instance, in mobile tele-

phones).

FRITZ!WLAN

Repeater N/G

To increase the WLAN range, especially under difficult or

strongly-shielding structural conditions, the FRITZ!WLAN

Repeater N/G, available as an accessory from AVM, can be

used in combination with the FRITZ!Box. It is especially

easy to install and can be operated at any 230-V power

outlet.

IEEE 802.11a

Because this standard works exclusively in the seldom

used 5-GHz range, it offers the opportunity to transmit da-

ta relatively free of interference from external influences.

WLAN adapters that support 802.11a are much less com-

mon that devices that work in accordance with the

802.11b/g standard.

IEEE 802.11b

With a maximum throughput rate of 11 Mbit/s, this is the

oldest standard for radio networks. Older WLAN adapters

of the first generation can communicate with the

FRITZ!Box using 802.11b. However, if the WLAN adapter

supports newer standards such as 802.11g, the latest

standard should be used.

IEEE 802.11g

This is currently the most common WLAN standard. It com-

municates with a maximum of 54 Mbit/s gross in the 2.4-

GHz frequency range (ISM) and guarantees broad compat-

ibility with many WLAN devices.

However, due to heavy use of the 2.4-GHz range, interfer-

ence is more common than in the less-used 5-GHz range.

IEEE 802.11n

This standard allows for high throughput rates and rang-

es. The FRITZ!Box supports 802.11n in the 2.4-GHz fre-

quency band, or, if desired, also in the 5-GHz frequency

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Setting the Right Standard in the FRITZ!Box

128

band. Modulation processes and antenna techniques like

MIMO (Multiple Input, Multiple Output) use the entire fre-

quency band available more effectively than the older

standards.

Thanks to compatibility with the 802.11g standard, you

can also continue to use older WLAN adapters.

Setting the Right Standard in the FRITZ!Box

The throughput rate that can be achieved in your radio

network depends on the WLAN standards used by the in-

tegrated WLAN adapters. These WLAN standards must al-

so be set in the FRITZ!Box. Proceed as follows to check

which WLAN standards are set and change them if need-

ed:

1.

Start a web browser.

2.

Open the FRITZ!Box user interface by entering

fritz.box

.

3.

Make sure that the expert setting is enabled in the

“System / Expert Mode” menu.

4.

Open the “WLAN / Radio Channel” menu.

5.

Enable the “Adjust radio standard” setting.

6.

Select the setting required in the “WLAN standard”

field.

•

In order to communicate with each other, the

FRITZ!Box and all WLAN adapters must work in the

same frequency band.

The use of the 802.11n standard—and thus the availabili-

ty of higher throughput rates—is possible only if the

WLAN connection is secured using the WPA2 security

mechanism (AES-CCMP).

Note the following for the configuration of this setting:

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129

Setting the Right Standard in the FRITZ!Box

•

The standard you configure in the FRITZ!Box must be

compatible with the standards of all WLAN adapters

used in the WLAN.

Make a note of which standards the WLAN adapters in

your network are compatible with and then adjust the

FRITZ!Box settings according to the following information:

•

Your radio network integrates only WLAN adapters

that are compatible with one or both of the following

standards:

–

802.11n

–

802.11g

Set the following mode in the FRITZ!Box:

Mode: 802.11n+g

The 2.4-GHz frequency band will be used.

•

Your radio network integrates only WLAN adapters

that are compatible with one or both of the following

standards:

–

802.11b

–

802.11g

Set the following mode in the FRITZ!Box:

Mode: 802.11b+g

The 2.4-GHz frequency band will be used.

•

Your radio network integrates only WLAN adapters

that are compatible with one or several of the follow-

ing standards:

–

802.11n

–

802.11g

–

802.11b

Set the following mode in the FRITZ!Box:

Mode: 802.11n+g+b

The 2.4-GHz frequency band will be used.

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The Standard for Security

130

•

Your radio network integrates only WLAN adapters

that are compatible with one or both of the following

standards:

–

802.11n

–

802.11a

Set the following mode in the FRITZ!Box:

Mode: 802.11n+a

The 5-GHz frequency band will be used.

The Standard for Security

IEEE 802.11i

The WPA2 security mechanism is defined in the

IEEE 802.11i standard. WPA2 is an extension of the famil-

iar security mechanism WPA (Wi-Fi Protected Access).

The main feature of the extension of WPA to WPA2 is the

AES-CCMP encryption process.

FRITZ!Box supports the AES encryption procedure as part

of the WPA2 mechanism, and the TKIP encryption proce-

dure as part of the WPA mechanism. This means that the

FRITZ!Box can be used in combination with any WLAN

adapters that also support WPA2 with AES or WPA with

TKIP.

Mechanism

Encryption

WPA

TKIP (Temporary Key Integrity Protocol)

WPA2

TKIP

AES-CCMP

based on the extremely secure AES (Ad-

vanced Encryption Standard) procedure.

CCM (Counter with CBC-MAC) defines how

the AES procedure is applied to WLAN

packets.

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