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27

 

6.  What is BSS ID

 

A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be 

configured with the same BSS ID. 

 

7.  What is WEP

 

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40 bit shared key 

algorithm, as described in the IEEE 802 .11 standard. 

 

8.  What is TKIP? 

TKIP is a quick-fix method to quickly overcome the inherent weaknesses in WEP security, 

especially the reuse of encryption keys. TKIP is involved in the IEEE 802.11i WLAN security 

standard, and the specification might be officially released by early 2003. 

 

9. What 

is 

AES? 

AES (Advanced Encryption Standard), a chip-based security, has been developed to ensure the 

highest degree of security and authenticity for digital information, wherever and however 

communicated or stored, while making more efficient use of hardware and/or software than 

previous encryption standards. It is also included in IEEE 802.11i standard. Compare with AES, 

TKIP is a temporary protocol for replacing WEP security until manufacturers implement AES at 

the hardware level. 

 

10.  Can Wireless products support printer sharing

   

Wireless products perform the same function as LAN products. Therefore, Wireless products can 

work with Netware, Windows 2000, or other LAN operating systems to support printer or file 

sharing. 

 

11.  Would the information be intercepted while transmitting on air

 

WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence 

Spread Spectrum technology, it has the inherent security feature of scrambling. On the software 

side, WLAN series offer the encryption function (WEP) to enhance security and Access Control. 

Users can set it up depending upon their needs. 

 

12.  What is DSSS

What is FHSS

And what are their differences

 

Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that changes frequency 

in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect 

is to maintain a single logical channel. To an unintended receiver, FHSS appears to be 

short-duration impulse noise. Direct-sequence spread-spectrum (DSSS) generates a redundant 

bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The 

longer the chip is, the greater the probability that the original data can be recovered. Even if one 

or more bits in the chip are damaged during transmission, statistical techniques embedded in the 

radio can recover the original data without-the need for retransmission. To an unintended 

receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most 

narrowband receivers. 

 

 

 

 

Содержание EW-7612U

Страница 1: ...802 11b g n Wireless LAN USB Adapter User Manual Version 1 0 May 2009...

Страница 2: ...espect to the contents hereof and specifically disclaims any warranties merchantability or fitness for any particular purpose Any software described in this manual is sold or licensed as is Should the...

Страница 3: ...f and on the user is encouraged to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment...

Страница 4: ...ith SAR for general population uncontrolled exposure limits in ANSI IEEE C95 1 1999 and had been tested in accordance with the measurement methods and procedures specified in OET Bulletin 65 Supplemen...

Страница 5: ...of those who install and use it However special attention must be paid to the dangers of electric shock and static electricity when working with electrical equipment All guidelines of this and of the...

Страница 6: ...URATION UTILITY 9 3 1 Utility Overview 9 3 2 Available Network 11 3 3 General 12 3 4 Profile 13 3 4 1 Configure the Profile 14 3 5 Status 18 3 6 Statistics 18 3 7 Wi Fi Protect Setup WPS 19 3 8 Softwa...

Страница 7: ...Advanced Encryption Standard which is a requirement for some corporate and government users This adapter is cost effective together with the versatile features it is the best solution for you to build...

Страница 8: ...25 65 C Humidity Max 95 NonCondensing Certification FCC CE 1 3 Package Contents Before you begin the installation please check the items of your package The package should include the following items...

Страница 9: ...ws XP Procedures are similar for Windows 2000 Vista Note2 If you have installed the Wireless PC Adapter driver utility before please uninstall the old version first I Install the Driver and Utility A...

Страница 10: ...D Now you ll see the following message please click Install to begin the installation E The system starts to install the driver and utility F Click Finish to complete the driver and utility installati...

Страница 11: ...icon in the system tray or right click the icon and select open configuration utility B The utility of the adapter is displayed Click Available Network and double click on the wireless access point yo...

Страница 12: ...A For Windows Vista user you can use Windows Zero Configuration to connect to wireless access point Click Start button then click Control Panel Click Network and Internet in Control Panel B Click Conn...

Страница 13: ...shown then click Connect D If it s an unnamed access point i e the SSID of this wireless access point is hidden you ll be prompted to input it s name and the name must be identical to the SSID setting...

Страница 14: ...have to input its security or passphrase here It must match the encryption setting on the access point F If you can see this image the connection between your computer and wireless access point is suc...

Страница 15: ...click the icon in the system tray there are some items for you to operate the configuration utility z Open Config Utility Select Open Config Utility to open the configuration utility z About Select A...

Страница 16: ...PC from the utility Show Tray Icon To show the icon in the system tray select the item Disable Adapter This function is for you to disable or enable the adapter Windows Zero Config To configure the a...

Страница 17: ...tion Available Network s This list shows all information of the available wireless networks within the range of your adapter The information includes SSID Channel Encryption Network Authentication Sig...

Страница 18: ...of an 802 11 Access Point All communication is done via the Access Point or Router IBSS Select this mode if you want to connect to another wireless stations in the Wireless LAN network without through...

Страница 19: ...ntly You are able to Add Remove Edit Duplicate Set Default to manage a profile Parameter Description Available Profile s This list shows the preferred networks for the wireless connection You can add...

Страница 20: ...nal merging of two co located WLANs You may specify a SSID for the adapter and then only the device with the same SSID can interconnect to the adapter This is a computer to computer ad hoc network wir...

Страница 21: ...PSK is also for home and small business The difference between WPA PSK and WPA2 PSK is that WPA2 PSK provides data encryption via the AES In contrast WPA PSK uses Temporal Key Integrity Protocol TKIP...

Страница 22: ...e WEP key It is more recognizable for user PASSPHRASE It is a text string with a maximum of 32 alphanumeric characters for example Test The WEP Key is based upon the Passphrase determined by you This...

Страница 23: ...e selected for use only when limited vendor choice for client access point and server products is not a concern When you have set up LEAP authentication you have to enter the user name and password of...

Страница 24: ...e and link status If you don t ensure the status of the adapter and the network you are connecting please go to the screen for more details 3 6 Statistics You can get the real time information about t...

Страница 25: ...hen press a WPS button or enter a set of 8 digit code on the wireless access point you wish to establish a secure connection I Pin Input Config PIN 1 The PIN code of your wireless network card is an e...

Страница 26: ...ease select the SSID of wireless access point that you wish to connect and click Select 4 Please wait while the install procedure is running and wait for few seconds to two minutes If a wireless acces...

Страница 27: ...click PBC button in wireless configuration utility to start to establish wireless connection by WPS Please be patient This may require several seconds to one minute to complete 2 When the connection b...

Страница 28: ...is the unique name identified in a WLAN The ID prevents the unintentional merging of two co located WLANs The default SSID of the AP is Full Computer Name _AP Wireless adapters connect to the AP shoul...

Страница 29: ...23 3 8 1 AP Properties Setting Please refer to Section 3 4 1 for the setting of the parameters for AP Note that Ad Hoc mode is not enabled for AP 3 8 2 AP Advanced...

Страница 30: ...reamble The preamble defines the length of the CRC block for communication among the wireless stations There are two mode including Long and Short High network traffic areas should use the shorter pre...

Страница 31: ...ou want to connect to the internet through this SoftAP you will need to make a bridge between our SoftAP and your internet connect Select the internet connection in your SoftAP host machine and press...

Страница 32: ...ludes the modulation schemes found in 802 11b including CCK for 11 and 5 5 Mbps and Barker code modulation for 2 and 1 Mbps B A protection mechanism called RTS CTS that governs how 802 11g devices and...

Страница 33: ...with Netware Windows 2000 or other LAN operating systems to support printer or file sharing 11 Would the information be intercepted while transmitting on air WLAN features two fold protection in secur...

Страница 34: ...other words more bandwidth is consumed than in the case of narrowband transmission but the trade off produces a signal that is in effect louder and thus easier to detect provided that the receiver kn...

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