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如果沒有對交換機(jī)進(jìn)行虛擬局域網(wǎng)技術(shù)設(shè)置，局域網(wǎng)交換機(jī)只能對確定目的地址的分組進(jìn)行單獨信息交換。各站點發(fā)送數(shù)據(jù)包之前都要廣播查詢所要到達(dá)目的地的mac地址，同時，由于大量應(yīng)用層軟件需要廣播傳送某些數(shù)據(jù)包，而這些數(shù)據(jù)廣播包只須發(fā)向某一組用戶，此時如果沒有vlan，這些數(shù)據(jù)包會很快占用整個網(wǎng)絡(luò)大量的資源，仍然象集線器一樣，向交換機(jī)的所有端口上轉(zhuǎn)發(fā)廣播信息。使得正常數(shù)據(jù)包無法搶得正常帶寬，嚴(yán)重影響到網(wǎng)絡(luò)效率及性能[3]。
廈門岳航計算機(jī)工程有限公司
聯(lián)系人：李素云
企業(yè)QQ：2851195446，2851195466
手機(jī)：18965423501
座機(jī)：0592-5165501
digital E-9276-C Output Module
digital E-9276-C Output Module (Broken Mounting Clip)
Carrier HT203617-2 Cold Temp Setpoint Control Panel (Broken Display Knob)
Accu-Sort Systems, Inc. DRX MINI-X Laser Bar Code Scanner
Allen Bradley 1746-HSCE High Speed Counter Encoder Series A (Missing Door)
Allen Bradley 1746-OA16 Output Module Series C SLC500
Allen Bradley 1746-IA16 Input Module Series D SLC500
HMS Electronics HS2-MPX-R/Q Anode Rotator with six Boards
Black Box SL010A MicroSwitch 9
Grayhill 70GRCQ24 I/O Rack
Cincinnati Milacron 3-424-1902A A900 Battery Backup
Transient Eliminator TE/4000HPS Surge Suppressor
PRO-LOG BX12R-01 12-Slot Rack with PRO-LOG 113473-001 Network Termination Card
Microscan MS-810 FIS0810-0004 Barcode/UPC Scanner
Diversified Electronics SP-0320 Module
Gordos DR-IDC24 I/O Module
Westinghouse NLPB-703
Westinghouse NLPL-180
Westinghouse NLPS-530
Westinghouse NLPS-531
Westinghouse NLR-1008
Westinghouse NLR-1012
Westinghouse NLR500
Westinghouse PC-100-201
Westinghouse PC-500
Westinghouse PC-502
Westinghouse PC1200 1042
Westinghouse PC700B-20-304008
9907-164 WOODWARD
BRC100 P-HC-BRC-10000000
BRC300 PHCBRC30000000
Reliance 45C912 5-Slot Rack
Joslyn XN50 277/480-3GY-FCC TransEnd Transient Surge Suppression System
Allen Bradley 1761-L32AWA MicroLogix 1000 Controller
GE Fanuc IC693MDL340B Output Module
Energy Concepts, Inc. 24322 Resistor Module
Advanced Micro Controls IPLC-1-3F Controller
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