Appendix E Wireless LANs
ZyXEL NWA-3500 User’s Guide
279
If the
Fragmentation Threshold
value is smaller than the
RTS/CTS
value (see previously)
you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as
data frames will be fragmented before they reach
RTS/CTS
size.
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 802.11b/g compliant wireless adapters support long preamble, but not
all support short preamble.
Select
Long
preamble if you are unsure what preamble mode the wireless adapters support,
and to provide more reliable communications in busy wireless networks.
Select
Short
preamble if you are sure the wireless adapters support it, and to provide more
efficient communications.
Select
Dynamic
to have the AP automatically use short preamble when wireless adapters
support it, otherwise the AP uses long preamble.
"
The AP and the wireless adapters 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.
Table 101
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)
Содержание NWA-3500
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Страница 7: ...Safety Warnings ZyXEL NWA 3500 User s Guide 7 ...
Страница 8: ...Safety Warnings ZyXEL NWA 3500 User s Guide 8 ...
Страница 10: ...Contents Overview ZyXEL NWA 3500 User s Guide 10 ...
Страница 20: ...Table of Contents ZyXEL NWA 3500 User s Guide 20 ...
Страница 26: ...List of Figures ZyXEL NWA 3500 User s Guide 26 ...
Страница 30: ...List of Tables ZyXEL NWA 3500 User s Guide 30 ...
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Страница 42: ...Chapter 1 Introducing the ZyXEL Device ZyXEL NWA 3500 User s Guide 42 ...
Страница 50: ...Chapter 3 Status Screens ZyXEL NWA 3500 User s Guide 50 ...
Страница 78: ...Chapter 4 Tutorial ZyXEL NWA 3500 User s Guide 78 ...
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Страница 102: ...Chapter 6 Wireless Configuration ZyXEL NWA 3500 User s Guide 102 ...
Страница 118: ...Chapter 7 Wireless Security Configuration ZyXEL NWA 3500 User s Guide 118 ...
Страница 126: ...Chapter 8 MBSSID and SSID ZyXEL NWA 3500 User s Guide 126 ...
Страница 140: ...Chapter 10 IP Screen ZyXEL NWA 3500 User s Guide 140 ...
Страница 156: ...Chapter 12 Remote Management Screens ZyXEL NWA 3500 User s Guide 156 ...
Страница 180: ...Chapter 14 Certificates ZyXEL NWA 3500 User s Guide 180 ...
Страница 204: ...Chapter 16 VLAN ZyXEL NWA 3500 User s Guide 204 ...
Страница 214: ...Chapter 17 Maintenance ZyXEL NWA 3500 User s Guide 214 ...
Страница 216: ...216 ...
Страница 230: ...Chapter 22 System Password ZyXEL NWA 3500 User s Guide 230 ...
Страница 250: ...Chapter 25 System Maintenance and Information ZyXEL NWA 3500 User s Guide 250 ...
Страница 256: ...256 ...
Страница 260: ...Appendix B Power over Ethernet PoE Specifications ZyXEL NWA 3500 User s Guide 260 ...
Страница 262: ...Appendix C Power Adaptor Specifications ZyXEL NWA 3500 User s Guide 262 ...
Страница 274: ...Appendix D Setting up Your Computer s IP Address ZyXEL NWA 3500 User s Guide 274 ...
Страница 310: ...Appendix H Text File Based Auto Configuration ZyXEL NWA 3500 User s Guide 310 ...
Страница 314: ...Appendix I Legal Information ZyXEL NWA 3500 User s Guide 314 ...
Страница 324: ...Index ZyXEL NWA 3500 User s Guide 324 ...