ZTE ZXDSL 931VII Netvigator Router Manual PDF (Setup & Configuration Guide)

Home

Manuals

ZXDSL 931VII Netvigator

Page 146 / 198 Scroll up to view Page 141 - 145

ZXDSL 931WII Operation manual

ABLE

27 WLAN B

ASIC

ERMS

Term

Description

Short for Access Point, a hardware

device or the software of a com-

puter that acts as a communica-

tion hub for users of a wireless de-

vice to connect to a wired LAN. APs

are important for providing rein-

forced wireless security and for ex-

tending the physical range of serv-

ice a wireless user has access to.

STA

Any device that contains an IEEE

802.11

conformant

medium

ac-

cess

control

(MAC)

physical

layer (PHY) interface to the wire-

less medium (WM).

SSID

Wireless networks use a Service

Set Identiﬁer (SSID) to allow wire-

less

devices

roam

within

the

range of the network.

Wireless

devices that wish to communicate

with each other must use the same

SSID. Several access points can be

set to use the same SSID, so that

wireless stations can move from

one

location

another

without

losing connection to the wireless

network.

The Guw5.5Z66-5 op-

erates in Infrastructure mode.

controls

network

access

the

wireless interface in its broadcast

area. It allows access to the wire-

less network by devices that use

the

correct

SSID

after

nego-

tiation process takes place.

default, the Guw5.5Z66-5 broad-

casts its SSID so that any wireless

station in range can learn the SSID

and ask permission to associate

with it.

Many wireless adapters

are

able

survey

scan

the

wireless

environment

for

access

points.

An access point in Infra-

structure

mode

allows

wireless

devices

survey

that

network

and

select

access

point

with

which to associate.

You may dis-

able SSID broadcas

Wireless Standard

Wireless

Standard

includes

802.11a,

802.11b,

802.11g,

and

802.11n.

�

802.11b

IEEE expanded the original 802.11 standard in July 1999, cre-

ating the 802.11b speciﬁcation. 802.11b supports bandwidth

140

Conﬁdential and Proprietary Information of ZTE CORPORATION

Page 147 / 198

Chapter 18 Wireless Conﬁguration

up to 11 Mbps, comparable to traditional Ethernet.

802.11b

uses the same unregulated radio signaling frequency (2.4 GHz)

as the original 802.11 standard.

Vendors often prefer using

these frequencies to lower their production costs.

Being unregulated,

802.11b devices can incur interference

from

microwave

ovens,

cordless

phones,

and

other

appli-

ances using the same 2.4 GHz range.

However, by installing

802.11b devices a reasonable distance from other appliances,

interference can easily be avoided.

�

802.11g

In 2002 and 2003, WLAN products supporting a newer stan-

dard called 802.11g emerged on the market.

802.11g at-

tempts to combine the best of both 802.11a and 802.11b.

802.11g supports bandwidth up to 54 Mbps, and it uses the

2.4 GHz frequency for greater range.

802.11g is backwards

compatible with 802.11b, meaning that 802.11g access points

work with 802.11b wireless network adapters and vice versa.

�

802.11a

While 802.11b was in development, IEEE created a second ex-

tension to the original 802.11 standard called 802.11a.

Be-

cause 802.11b gained popularity much faster than 802.11a, it

is believed that 802.11a was created after 802.11b.

In fact,

802.11a was created at the same time.

Due to its higher

cost, 802.11a is usually found on business networks whereas

802.11b better serves the home market.

802.11a supports bandwidth up to 54 Mbps and signals in a

regulated frequency spectrum around 5 GHz. This higher fre-

quency compared to 802.11b shortens the range of 802.11a

networks.

The higher frequency also means 802.11a signals

have more difﬁculty penetrating walls and other obstructions.

Because 802.11a and 802.11b utilize different frequencies, the

two technologies are incompatible with each other. Some ven-

dors offer hybrid 802.11a/b network devices, but these prod-

ucts merely implement the two standards side by side (each

connected devices must use one or the other).

Use

below to get some quick information to help you

differentiate between the available wireless networking standards.

ABLE

28 W

IRELESS

ETWORKING

TANDARDS

Standard

Data Rate

Modu-

lation

Scheme

Security

Pros/Cons

& More

Info

IEEE

802.11

Mbps in the

2.4

GHz

band

FHSS

DSSS

WEP &

WPA

This

speci-

ﬁcation

has

been

ex-

tended

into

802.11b.

Conﬁdential and Proprietary Information of ZTE CORPORATION

141

Page 148 / 198

ZXDSL 931WII Operation manual

Standard

Data Rate

Modu-

lation

Scheme

Security

Pros/Cons

& More

Info

IEEE

802.11a

(Wi-Fi)

Mbps in the

5 GHz band

OFDM

WEP & WPA

Products

that

ad-

here to this

standard

are

consid-

ered

“Wi-Fi

Certiﬁed”.

Eight

avail-

able

chan-

nels.

Less

potential for

interfer-

ence

than

802.11b

and

802.11g.

Better

than

802.11b

supporting

multime-

dia

voice,

video

and

large-image

applications

densely

populated

user

envi-

ronments.

Relatively

shorter

range

than

802.11b.

Not

intero-

perable with

802.11b.

IEEE

802.11b

(Wi-Fi)

Mbps in the

2.4

GHz

band

DSSS

with

CCK

WEP & WPA

Products

that

ad-

here to this

standard

are

consid-

ered

“Wi-Fi

Certiﬁed”.

Not

intero-

perable with

802.11a.

Requires

fewer

access

points

than

802.11a

for

coverage

large areas.

Offers high-

speed

ac-

cess to data

at up to 300

feet

from

base

sta-

tion.

channels

available

142

Conﬁdential and Proprietary Information of ZTE CORPORATION

Page 149 / 198

Chapter 18 Wireless Conﬁguration

Standard

Data Rate

Modu-

lation

Scheme

Security

Pros/Cons

& More

Info

the

2.4GHz

band

(only

11 of which

can be used

the

U.S.

due

FCC

regulations)

with

only

three

non-

overlapping

channels.

IEEE

802.11g

(Wi-Fi)

Mbps in the

2.4

GHz

band

OFDM above

20Mbps,

DSSS

with

CCK

below

20 Mbps

WEP & WPA

Products

that

ad-

here to this

standard

are

consid-

ered

“Wi-Fi

Certiﬁed”.

May replace

802.11b.

Improved

security

enhance-

ments

over

802.11.

Compati-

ble

with

802.11b.

14 channels

available

the

2.4GHz

band

(only

11 of which

can be used

the

U.S.

due

FCC

regulations)

with

only

three

non-

overlapping

channels.

Note:

Maximum wireless signal rate based on IEEE Standard 802.11g

speciﬁcations is 54 Mbps. But actual data throughput varies. Net-

work conditions and environmental factors, including volume of

network trafﬁc, building materials and construction, and network

overhead causes lower actual data throughput rate.

Conﬁdential and Proprietary Information of ZTE CORPORATION

143

Page 150 / 198

ZXDSL 931WII Operation manual

Wireless Security

Various security options are available on the Guw5.5Z66-5 includ-

ing open or WEP, 802.1x, WPA, WPA-PSK, WPA2 and WPA2-PSK.

The following section describes some authentications.

WEP

Wireless Encryption Protocol (WEP) is part of the IEEE 802.11 wire-

less networking standard and was designed to provide the same

level of security as that of a wired

LAN

. Because wireless net-

works broadcast messages using radio, they are susceptible to

eavesdropping, WEP provides security by encrypting data over ra-

dio waves so that it is protected as it is transmitted from one end

point to another.

WEP was the encryption scheme considered to be the initial stan-

dard for ﬁrst generation wireless networking devices. However, it

has been found that WEP is not as secure as once believed. WEP is

used at the two lowest layers of the

OSI

model - the data link and

physical layers; it therefore does not offer end-to-end security.

The major weakness of WEP is its use of static encryption keys.

When you set up a router with a WEP encryption key, that key is

used by every device on your network to encrypt every packet that

is transmitted.

But the fact that packets are encrypted does not

prevent them from being intercepted, and due to some technical

ﬂaws it is entirely possible for an eavesdropper to intercept enough

WEP-encrypted packets to eventually deduce what the key is.

WPA

Wi-Fi Protected Access (

WPA

) debuts to address many shortcom-

ings of WEP. It includes two improvements over WEP:

�

Improved data encryption through the temporal key integrity

protocol (TKIP). TKIP scrambles the keys using a hashing al-

gorithm and, by adding an integrity-checking feature, ensures

that the key is not tampered.

�

User authentication, which is generally missing in WEP, through

the extensible authentication protocol (EAP). WEP regulates

access to a wireless network based on a computer’s hard-

ware-speciﬁc MAC address, which is relatively simple to be

sniffed out and stolen.

EAP is built on a more secure pub-

lic-key encryption system to ensure that only authorized net-

work users can access the network.

To encrypt a network with WPA Personal/PSK, you should set up

your router not with an encryption key, but rather with a plain-Eng-

lish passphrase between 8 and 63 characters long. Using a tech-

nology called TKIP, that passphrase, along with the network SSID,

is used to generate unique encryption keys, which are constantly

changed, for each wireless client.

Although WEP also supports

passphrases, it does so only as a way to more easily create static

keys, which are usually comprised of the hex characters 0-9 and

A-F.

802.1x

The 802.1x standard is designed to enhance the security of wire-

less local area networks (

WLAN

s) that follow the IEEE 802.11 stan-

dard.

802.1x provides an authentication framework for wireless

LANs, allowing a user to be authenticated by a central authority.

The actual algorithm that is used to determine whether a user is

authentic is left open and multiple algorithms are possible.

144

Conﬁdential and Proprietary Information of ZTE CORPORATION

Rate

Popular ZTE Models

Famous Router IPs

Famous Router Companies

Bookmark Our Site

Share