Appendix C Wireless LANs
NBG-510S User’s Guide
185
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 802.11 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 ZyXEL Device uses long preamble.
"
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.
Table 68
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)
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Страница 7: ...Safety Warnings NBG 510S User s Guide 7 This product is recyclable Dispose of it properly ...
Страница 8: ...Safety Warnings NBG 510S User s Guide 8 ...
Страница 10: ...Contents Overview NBG 510S User s Guide 10 Troubleshooting and Appendices 163 Troubleshooting 165 ...
Страница 18: ...Table of Contents NBG 510S User s Guide 18 ...
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Страница 44: ...Chapter 5 Setup Wizard NBG 510S User s Guide 44 Figure 20 Wizard Applying Internet Settings ...
Страница 58: ...Chapter 6 Tutorials NBG 510S User s Guide 58 ...
Страница 59: ...59 PART II Network Wireless LAN 61 WAN 69 LAN 77 DHCP 79 NAT and Firewall WAN to LAN 81 DDNS 89 ...
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Страница 76: ...Chapter 8 WAN NBG 510S User s Guide 76 ...
Страница 78: ...Chapter 9 LAN NBG 510S User s Guide 78 ...
Страница 88: ...Chapter 11 NAT and Firewall WAN to LAN NBG 510S User s Guide 88 ...
Страница 91: ...91 PART III Security Access Control 93 Content Filtering 101 ...
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Страница 100: ...Chapter 13 Access Control NBG 510S User s Guide 100 ...
Страница 103: ...103 PART IV Management UPnP 105 Static Route 113 ...
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Страница 116: ...Chapter 16 Static Route NBG 510S User s Guide 116 ...
Страница 117: ...117 PART V Maintenance System 119 Logs 123 Tools 125 ...
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Страница 136: ...Chapter 20 Secure Remote Access Title NBG 510S User s Guide 136 ...
Страница 140: ...Chapter 21 Secure Remote Access User Info NBG 510S User s Guide 140 ...
Страница 150: ...Chapter 23 Manage User Access Permissions NBG 510S User s Guide 150 ...
Страница 154: ...Chapter 24 Secure Remote Desktop Control NBG 510S User s Guide 154 ...
Страница 162: ...Chapter 25 Secure Remote Access Screens NBG 510S User s Guide 162 ...
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Страница 170: ...Chapter 26 Troubleshooting NBG 510S User s Guide 170 ...
Страница 176: ...Appendix A Product Specifications NBG 510S User s Guide 176 ...
Страница 180: ...Appendix B Common Services NBG 510S User s Guide 180 ...
Страница 198: ...Appendix D Legal Information NBG 510S User s Guide 198 ...
Страница 204: ...Appendix E Customer Support NBG 510S User s Guide 204 ...
Страница 209: ...Index NBG 510S User s Guide 209 WPA PSK 189 190 application example 191 ...
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