There are several possible causes for this failure:
(1) wireless network card distance from the wireless AP or wireless router is too far, more than the coverage of wireless networks, wireless signal to reach the wireless network card has been very weak, so that wireless clients can not be normal connection.
(2) The wireless AP or wireless router does not power up or does not work properly, causing the wireless client to not connect at all.
(3) When the wireless client distance from the wir
Analysis of demand and application of microwave trunk access for ISP group usersThe Computer network communication protocol is TCP/IP;Provide at least >64kbps data communication rate;Network isolation is implemented by the local router;Establish a Level two network, select the users with better geographical conditions to establish a secondary center to meet the requirements of user access within the metropolitan area;The omni-direction antenna can be
2.4ghz11mbps technology speed slow compatibility good price low
802.11g 2.4ghz/5ghz54mbps Mainstream technology fast compatibility good price low
802.11N (draft) 2.4ghz/5.8ghz300mbps future technical speed fast compatibility difference price high
Misunderstanding, the stronger the signal, the better.
First of all, let's take a look at some of the wireless product hardware indicators: transmission power, acceptance sensitivity and antenna gain. At
wireless bridge connects an antenna to form a bridging relay to ensure high-speed wireless link communication. The two back-to-back APS can be in different frequencies and work in the wireless bridge mode at the same time, so that their functions can be expanded and the signal can be maximized during the forwarding process. Increase the bandwidth and speed to the maximum, so as to meet the high requirements of users, to ensure their smooth degree.
The starting point of establishing a secure wireless network access node (access point) is to prevent information leakage from unauthorized external access. This principle is often difficult to understand. The security settings of wireless networks are much more complex than those of ordinary cable networks, because the access nodes of the cable networks are fixed and within the signal sending and receiving range of wireless networks, all nodes can be connected.
Problems caused by the characteri
The previous article introduced the basic introduction of the built-in wireless network card. I think you have some knowledge about some common types of built-in wireless NICs. Next we will talk about the selection and upgrade of the built-in wireless network card. Hope to help you.
◆ How to select and upgrade a built-in wireless network card
If conditions permit, you can choose a laptop with a built-in wireless network card, which is more convenient to use. Of course, laptops with built-in wire
confidence, and it will never be "fooled ". These four aspects are: Brand and design, quality and performance, simple and easy to use, and the key is price.
1) brand and Design
Needless to say, a large brand determines everything about the product, and network products are no exception. A good brand includes the product quality, quality, and after-sales service. Please note: do not purchase products from small factories. The products of small manufacturers cannot guarantee quality or provide st
GPRS card.
I will explain for you how to install and use the wireless network card when using the hardware device: wireless network card is a product from South Korea's different show YISO, notebook is COMPAQ's EVO N800C.
When I first selected yixiu YISO, the wireless network interfaces on the market were not as rich as they are today, and there were not so many products of domestic brands, and the price was high. Yixiu adopts the built-in antenna an
"service unavailability" or become a stepping stone to attack other networks ". To minimize the risks caused by security vulnerabilities, make sure that network technicians configure and test according to the following suggestions.
Wireless Network Application configuration 1. Configure the antenna installation location
This is the first step to achieve "non-leak" wireless access nodes. the wireless signal coverage is used to determine the location o
network nodes. These data streams reassemble the files at the specified receiver ."
To meet these requirements, a network software stack must handle dynamically changing network configurations. As a result, the network is already focusing on their new research.
Antenna design is the key
The key to wireless body networks is the design of antennas. According to the school's website, the ideal antenna used by
Misunderstanding 1. The stronger the signal, the better.
First, let's take a look at several hardware metrics of wireless products: transmit power, accept sensitivity, and antenna gain. At present, the main disadvantage of wireless networks is signal coverage and transmission rate. Generally, the method to enhance the signal is to increase the transmit power and antenna gain.
Transmit power: wireless device
that network technicians configure and test according to the following suggestions.
1. Configure the antenna installation position
This is the first step to achieve "non-leak" wireless access nodes. the wireless signal coverage is used to determine the location of the Access Node antenna. Do not place the antenna next to the window because the glass cannot block
used to set up a wireless network. In this way, network resources can be shared in a wireless mode with an existing wired architecture.
Q3: Will WLAN interference or affect the operation of other devices?
ANS: basically, the frequency band used by wireless networks is within the high frequency range of ISM 2.4GHz. It does not interfere with the electrical appliances used in daily life or office, because the frequency is quite different, in addition, the wireless network itself has 12 channels a
technicians configure and test according to the following suggestions.
Wireless Network Application configuration 1. Configure the antenna installation location
This is the first step to achieve "non-leak" wireless access nodes. the wireless signal coverage is used to determine the location of the Access Node antenna. Do not place the antenna next to the window
technicians configure and test according to the following suggestions.
1. Configure the antenna installation position
This is the first step to achieve "non-leak" wireless access nodes. the wireless signal coverage is used to determine the location of the Access Node antenna. Do not place the antenna next to the window because the glass cannot block the leakage
performance, stability, and wireless coverage. At the same time, using the CCA technology can automatically avoid channel interference and take full advantage of channel bundling.I'm interested in this dual-built antenna, so I took this guy apart and looked at the internal structure. 650) this. width = 650; "onclick = 'window. open (" http://blog.51cto.com/viewpic.php?refimg= "+ This. src) 'alt =" "src =" http://www.bkjia.com/uploads/allimg/131227/03
Antenna Placement
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 8721
Accepted: 4330
DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called
Antenna Placement
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 7788
Accepted: 3880
DescriptionThe Global aerial Centre have been allotted the task of building the fifth generation of mobile phone nets in swed En. The most striking reason so they got the job, is their discovery of a new, highly noise resistant, antenna. It's called
Emi--electro Magnetic interference Electromagnetic interferencedefinition: refers to the electromagnetic wave and electronic components after the action of the interference phenomenon.Category: There are two kinds of conduction interference and radiation interference. Conduction disturbance:is the coupling (interference) of a signal from one electrical network to another by means of a conductive medium.Radiated interference:Refers to the interference source through space to its signal coupling (
, mostly passive label, the application range is less than 1m, the disadvantage is that the information is small, and only suitable for low-speed scene 2. Medium-High Frequency electronic label, also mostly passive electronic label, must be in the range of the reader antenna radiation; ultra-high-frequency wireless microwave technology, can be active or passive, for the active, the reader's antenna radiatio
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