Preamble Type; Wireless Distribution System (Wds); Wifi Protected Setup (Wps) - ZyXEL Communications VMG1312-B Series User Manual

• You m ust use different keys for different BSSs. I f t wo wireless devices have different BSSI Ds
( t hey are in different BSSs) , but have t he sam e keys, t hey m ay hear each ot her 's
com m unicat ions ( but not com m unicat e wit h each ot her) .
• MBSSI D should not replace but rat her be used in conj unct ion wit h 802.1x securit y.

7.10.7 Preamble Type

Pream ble is used t o signal t hat dat a is com ing t o t he receiver. Short and long refer t o t he lengt h of
t he synchronizat ion field in a packet .
Short pream ble increases perform ance as less t im e sending pream ble m eans m ore t im e for sending
dat a. All I EEE 802.11 com pliant wireless adapt ers support long pream ble, but not all support short
pream ble.
Use long pream ble if you are unsure what pream ble m ode ot her wireless devices on t he net work
support , and t o provide m ore reliable com m unicat ions in busy wireless net works.
Use short pream ble if you are sure all wireless devices on t he net work support it , and t o provide
m ore efficient com m unicat ions.
Use t he dynam ic set t ing t o aut om at ically use short pream ble when all wireless devices on t he
net work support it , ot herwise t he Device uses long pream ble.
Not e: The wireless devices MUST use t he sam e pream ble m ode in order t o com m unicat e.

7.10.8 Wireless Distribution System (WDS)

The Device can act as a wireless net work bridge and est ablish WDS ( Wireless Dist ribut ion Syst em )
links wit h ot her APs. You need t o know t he MAC addresses of t he APs you want t o link t o. Once t he
securit y set t ings of peer sides m at ch one anot her, t he connect ion bet ween devices is m ade.
At t he t im e of writ ing, WDS securit y is com pat ible wit h ot her ZyXEL access point s only. Refer t o
your ot her access point 's docum ent at ion for det ails.
The following figure illust rat es how WDS link works bet ween APs. Not ebook com put er A is a
wireless client connect ing t o access point AP 1 . AP 1 has no wired I nt ernet connect ion, but it can
est ablish a WDS link wit h access point AP 2 , which has a wired I nt ernet connect ion. When AP 1
has a WDS link wit h AP 2 , t he not ebook com put er can access t he I nt ernet t hrough AP 2 .
Figure 45 WDS Link Exam ple
A

7.10.9 WiFi Protected Setup (WPS)

Your Device support s WiFi Prot ect ed Set up ( WPS) , which is an easy way t o set up a secure wireless
net work. WPS is an indust ry st andard specificat ion, defined by t he WiFi Alliance.
VMG1312-B Series User's Guide
WDS
AP 1 AP 2
Chapter 7 Wireless
131