GE  DS215TCQAG1BZZ01A(DS200TCQAG1BHF)

 现在是一个WIFI时代，人的基本状态是到一个地方首先连接WIFI，多大多数的智能手机都支持a/b/g/n这些无线协议，甚至还支持更高级别的无线。即使现在做监控使用5.8G的网桥，是相对比较干净，抗干扰强的设备，但是一个公开的无线信号广播在大庭广众之下，势必会把很多无用的终端自动接入进来，无形之中增加了无线网桥的负荷。随着时间后移，接入的终端越来越多，无线网桥本身自组网信号传输的效率就会下降，丢包、延时的情况就会出现。

    要解决以上问题，就必须要给无线网桥进行加密，甚至通过一些特殊手段保证其他无线终端无法接入。无线网桥常用到的加密方式如下。

    1，MAC地址过滤

    MAC地址过滤是采用硬件控制的机制来实现对接入无线终端的识别。由于无线终端的网卡都具备唯一的MAC地址，若启用MAC地址过滤机制，只有当客户机的MAC地址为合法MAC时，无线网桥才允许终端与之通信。

    2，SSID隐藏

    SSID一般可以通过终端扫描获取，无线网桥支持隐藏SSID功能，这样无线终端就无法自动扫描获取SSID，可以防止终端接入无线网桥。

    3，WEP加密

    无线网络实现了802.11协议中基于共享秘钥的加密机制，称为“有线对等保密WEP”的技术。WEP是一种基于RC-4算法的40bit或128bit加密方式，移动终端和无线路由器可以配置4组WEP加密，加密传输数据时可以轮流使用，允许加密秘钥动态改变。加密级别高，基本满足普通企业用户需求。

    4，802.1x认证技术

    802.1x是指端口访问控制技术，是802.11i无线安全协议族的重要组成部分，是用于无线数据网络的一种增强性网络安全解决方案。当无线终端与无线网桥关联后，是否可以使用无线网桥的服务取决于802.1x的认证结果。如果认证通过，则设备为终端打开这个逻辑端口，否则不允许用户上网。

    5，AES算法加密

    AES指高级加密标准算法，是802.11i无线安全协议族的重要组成部分，AES是一种对称的块加密技术，提供比WEP/TKIP中RC-4算法更高级的加密性能。AES更具随机性，它比WEP具有更高的安全性，攻击者要获取大量的密文，耗用很大的资源，话费更长的时间破译。利用AES算法加密，无线网络的安全性会获得大幅度提高，从而能够有效地防御外界攻击。

    从以上可以看出，大家如果用无线网桥做监控，一定要注意其加密功能，加密方式越多越好。如莱安科技的无线网桥都支持MAC地址过滤、WEP加密、802.1x认证技术、WPA、WPA2等加密方式，这样的话更安全，无线信号传输更稳定。

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MALLORY VWIK P4 CONTROL 1 K OHM 5 WATT NEW IN BOX (BB1-1)

NEW FALK 1040T HUB 0704609 1.500 BORE 3/8X3/16 KW (J4-1)

PARKER WATTS PNEUMATIC LUBRICATOR L50-04R M7 (M3)

BURNS ENGINEERING 200C10A2A1A090 THERMOCOUPLE STAINLESS STEEL 13" NEW (LL5)

ALLEN-BRADLEY BUL 700 TYPE RT SOLID STATE TIMER USED NO BOX (RR5)

CROUSE-HINDS ABB CEAG SPEC 504 SAFETY BARRIER 115 9440M1787 LOT 6 USED (WL37-2)

INTERMATIC FF6H COMMERCIAL 6 HOUR TIMER STEEL PLATE W/ SCREWS AND KNOB (BIN58)

ALLIED SYSTEMS CO Y010190 BALL BEARING RACE 2 1/2 X 13 1/2 NEW NO BOX (TT3-1)

AAR SP83 1 1/2" 3M UA5 A/SA105 PIPE FITTING USED NO BOX (RR3-1)

NEW LOT OF 5 ALLEN-BRADLEY 199-FSMZ-1 SER B SURGE SUPPRESSOR NEW (KK2)

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MALLORY TA14L TAB MOUNT CONT. 10K OHM #4 TAPER NEW IN BOX (BB1-1)

ALLEN-BRADLEY ? WHITE PUSH BUTTON HEAD CAPS LOT OF 10 (HH2-3)

SELECTA SS210-9-BG TOGGLE SWITCH ON/OFF 16 AMP (AA1-1)

NIB** NTN W5308ZNR BALL BEARINGS DOUBLE ROW BALL W5308ZNR - 99-11 (328)

NIB NEW CATERPILLAR 7V-4077 SPIDER AND BRG BEARING UNIVERSAL JOINT U-JOINT (G4)

DAYTON 3 M TON ROLLER BEARING TROLLEY USED NO BOX (37)

ADAPTABEACON 94A-N5 120V 60HZ 0.1A INDOOR/OUTDOOR (QQ2)

RB KANALFLAKT KK200 CEILING MOUNT FAN HEAT,COOLING OR EXHAUST 115V 60CY (UU5)

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BUSSMAN FUSETRON FRS-R-4-1/2 DUAL ELEMENT TIME DELAY FUSES BOX OF 9 USED (CC3-1)

CLEVELAND 3 HIGH SPIRAL FLUTE 10-24 HS BOTTOMING TAP 6" LOT OF 4 NEW (WL35-2)

SCOTCH 3M 35 RED VINYL ELECTRICAL TAPE 3/4IN X 66FT BRAND NEW (WL29-2)

TELEMECANIQUE LC1K0610F7 OVERLOAD CONTACTOR 110V 50/60HZ USED IN BOX (BB5-3)

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TOYOTA FORKLIFT EQUIPMENT OIL FILTER ELEMENT HYDRAULIC 67502-23320-71 NEW (AA3)

MARTIN DECKER HANGING CRANE SCALE 1,000 LBS B621C0010 USED WITH NO BOX (Q8)

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NIB EATON CUTLER HAMMER EENO8A NEUTRAL CONTACTOR KIT TYPE EE 800A 600V (XX4)

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SPORLAN CATCH-ALL FILTER-DRIER C-305-HH 5/8: SAE FLARE NEW (TT2)

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LEESON ELECTRIC MOTOR NEW 110441 1/3 HP (V5)

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MEF METALLIZED CAPACITOR 154Ja 2 PCS 250 MEF2 LOT OF 100 NEW (BIN 66)

FELLOWES COMPUTER CABLE 15' PARALLEL PRINTER CABLE NEW (VV5-1)

PYCO PENNDEL-PA THERMOCOUPLE STAINLESS STEEL 29" NEW (LL5)

APPLETON ELECTRIC G-HPHP-24 RECEPT HANGERS WITH ONE HUB NEW IN BOX (P6)

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STRUTHERS & DUNN DUNCO MONITOR TIMER RELAY 43-500 35 SEC (DR2D-1)

MAREMONT FLUID POWER R-302-K 0-8 BAR 1/4" USED (WL40-2)

IDEAL ELECTRIC MODEL 31-184 FISH TAPE WINDER NEW IN BOX (AA2-2)

SQUARE D 9050 JCK-56 SOLID STATE TIMING RELAY SERIES A NEW IN BOX (R6-1)

NEW CUTLER-HAMMER HEATER COIL H1028 NO BOX (BIN23)

NICHOLSON A105N N-300 THERMOSTATIC STEAM TRAP 1/2" NPT USED NO BOX (PP4-1)

MODICON AS-MBII-003 DROP CABLE 50 FT NEW IN BOX (Q4)

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BUSSMAN FUSETRON FRS-R-1-4/10 DUAL ELEMENT TIME DELAY FUSES BOX OF 7 USED(CC3-1)

NIB* RED HAT VALVES ASCO AUTOMATIC SWITCH U28262C2 1/8 PIPE 6 WATTS (260)

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NEW ALLEN BRADLEY GREEN PUSH BUTTONS 800H-BK1 SERIES B (X2-2)

MORSE 127798 80 O/L 20PB OFFSET CHAIN LINK LOT OF 3 NEW IN PACKAGE (L6-2)

A LOT OF 2 TOTAL SOURCE HY0125847 NUT WING NUT-WING AE9V/00 LIFT PARTNER (BIN60)

PALL HC6400FDN13Z ULTIPOR III FILTER HYDRAULIC (CC3)

GENERAL ELECTRIC 20A-3 PHASE 120/208V 4 PRONG MALE TWIST-LOCK PLUG USED (L6-1)

HYSTER 1451735 FORKLIFT GASKET LOT OF 2 NEW NO BOX (AA3)

TRIAD ELECTRONIC BALLAST INSTANT START B232IUNVHP-B 120 TO 277 VOLTS NEW (TT3-2)

NEW KERKAU 8 1/2" SPOOL W/ TWO 4 HOLE 1/2" STAINLESS STEEL A182 FLANGE (O2-1)

T&B CONDUIT SPACER 1-1/4"-1-1/2" & 2" CONDUIT BOX OF 25 NEW IN BOX (UU5)

CROUSE-HINDS ABB CEAG SPEC 504 SAFETY BARRIER 1149130M1351 LOT 5 USED (WL37-2)

BROWNING 2160 MAX R.P.M SHEAVE PULLEY WHEEL 16X16" NEW NO BOX (EE3)

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MORSE 127867 50 O/L EPT-ISO 9002 1PB CHAIN LINK LOT OF 11 NEW IN PACKAGE (L6-2)

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CROUSE-HINDS ABB CEAG SPEC 504 SAFETY BARRIER 1139230M0201 USED (WL37-1)

NEW ALLEN-BRADLEY 1491-N122 SER B NEW (BIN52)

CROUSE-HINDS ABB CEAG SPEC 504 SAFETY BARRIER 114-943M2427 LOT 4 USED (WL36-2)

LIFTPARTNERS WATER PUMP 1384 AHF57/00 NEW IN BOX (LL5)

BUSSMAN BUSS TRON RECIFIER FUSES KAC 20 6 OF THESE NEW (217-2)

GE 55-150695G002 COIL 115V 60HZ GENERAL ELECTRIC COIL (N3-2)

NEW US SEAL PS-394 PUMP SEAL (AA1-1)

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AIR LOGIC WIRE HARNESS F-5100-5FT-3C NEW IN BAG (DD5-1)

T&B CONDUIT SPACER 1-1/4"-1-1/2" & 2" CONDUIT BOX OF 19 NEW IN BOX (UU5)

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HELI-COIL 5-40 STI NC GH2 HSS A 05-CSA HAND TAP LOT OF 10 NEW NO BOX (WL29-1)

HUBBELL TWIST LOCK CONNECTOR USED NO BOX 20A 125/250V (L6-1)

FAG 22228E SK 22228ESK C3 SPHERICAL ROLLER BEARING 140x250x68MM (PP5)