ZyXEL WAP3205 Manuel d'utilisateur télécharger pdf (Page 171)

Appendix D Wireless LANs

WAP3205 v2 User’s Guide

171

Preamble Type

Preamble is used to signal that data is coming to the receiver. Short and long refer to the length of

the synchronization field in a packet.

Short preamble increases performance as less time sending preamble means more time for sending

data. All IEEE 802.11 compliant wireless adapters support long preamble, but not all support short

preamble.

Use long preamble if you are unsure what preamble mode other wireless devices on the network

support, and to provide more reliable communications in busy wireless networks.

Use short preamble if you are sure all wireless devices on the network support it, and to provide

more efficient communications.

Use the dynamic setting to automatically use short preamble when all wireless devices on the

network support it, otherwise the WAP3205 v2 uses long preamble.

Note: The wireless devices MUST use the same preamble mode in order to communicate.

IEEE 802.11g Wireless LAN

IEEE 802.11g is fully compatible with the IEEE 802.11b standard. This means an IEEE 802.11b

adapter can interface directly with an IEEE 802.11g access point (and vice versa) at 11 Mbps or

lower depending on range. IEEE 802.11g has several intermediate rate steps between the

maximum and minimum data rates. The IEEE 802.11g data rate and modulation are as follows:

Wireless Security Overview

Wireless security is vital to your network to protect wireless communication between wireless

clients, access points and the wired network.

Wireless security methods available on the WAP3205 v2 are data encryption, wireless client

authentication, restricting access by device MAC address and hiding the WAP3205 v2 identity.

Table 61 IEEE 802.11g

DATA RATE (MBPS) MODULATION

1 DBPSK (Differential Binary Phase Shift Keyed)

2 DQPSK (Differential Quadrature Phase Shift Keying)

5.5 / 11 CCK (Complementary Code Keying)

6/9/12/18/24/36/48/54 OFDM (Orthogonal Frequency Division Multiplexing)

1 2 ... 166 167 168 169 170 171 172 173 174 175 176 ... 193 194

Pas de commentaire

ZyXEL WAP3205 Manuel d'utilisateur Page 171